# NGK Spark Plug Dimensions: 14mm Plugs

## NGK Spark Plug Dimensions: 14mm Plugs

683 plugs. The physical dimensions of each plug in the NGK range: thread size, reach, hex, seat type and whether the tip is projected. This is what decides whether a plug will physically fit and seal, before heat range comes into it. **Plug codes are links — click one to go straight to that plug on our shop.**

**Reach and seat type are not interchangeable.** A plug that is too long can hit the piston; one that is too short leaves thread exposed in the combustion chamber and will not transfer heat properly. A tapered-seat plug will not seal in a gasket-seat head. Match all of thread, reach and seat, then match the heat range.

### 14mm Spark Plugs 683 plugs

NGK plug

Range

Reach

Hex

Seat

Notes

BCPR5EIX · [BCPR6EIX](/products/bcpr6eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BCPR7EIX](/products/bcpr7eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

JIS Projected

[BCPR5EIX-11](/products/bcpr5eix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BCPR6EIX-11](/products/bcpr6eix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · BCPR7EIX-11

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

JIS Projected Wide Gap

[BKR4EIX](/products/bkr4eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BKR5EIX](/products/bkr5eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BKR6EIX](/products/bkr6eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BKR7EIX](/products/bkr7eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BKR8EIX](/products/bkr8eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BKR9EIX](/products/bkr9eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected BK-Series

[BKR5EIX-11](/products/bkr5eix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BKR6EIX-11](/products/bkr6eix-11-ngk-iridium-spark-plug-ix) · [BKR7EIX-11](/products/bkr7eix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected BK-Series Wide Gap

[BPR5EIX](/products/bpr5eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BPR6EIX](/products/bpr6eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BPR7EIX](/products/bpr7eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BPR8EIX](/products/bpr8eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BPR9EIX](/products/bpr9eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · BPR10EIX

Iridium

3/4" Reach

13/16" Hex

Gasket, Loose

Projected

[BPR5EIX-11](/products/bpr5eix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BPR6EIX-11](/products/bpr6eix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

13/16" Hex

Gasket, Solid

Projected, Wide Gap

[BPR6HIX](/products/bpr6hix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BPR7HIX](/products/bpr7hix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BPR8HIX](/products/bpr8hix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

1/2" Reach

13/16" Hex

Gasket, Loose

Projected

BR6FIX · YR5IX

Iridium

.460" Reach

5/8" Hex

Tapered, Solid

[BR6HIX](/products/br6hix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BR7HIX](/products/br7hix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BR8HIX](/products/br8hix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · BR9HIX · BR10HIX

Iridium

1/2" Reach

13/16" Hex

Gasket, Loose

[BR7EIX](/products/br7eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BR8EIX](/products/br8eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BR9EIX](/products/br9eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BR10EIX](/products/br10eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

13/16" Hex

Gasket, Loose

[BR8ECMIX](/products/br8ecmix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [BR9ECMIX](/products/br9ecmix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · BR10ECMIX

Iridium

3/4" Reach

13/16" Hex

Gasket, Solid

Compact

BR8ECSIX · BR9ECSIX

Iridium

3/4" Reach

13/16" Hex

Gasket, Solid

Low Angle

BR8EIX SOLID · BR9EIX SOLID · BR10EIX SOLID · [IGR7A-G](/products/igr7a-g-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

13/16" Hex

Gasket, Solid

BR9ECSIX-5

Iridium

3/4" Reach

13/16" Hex

Gasket, Solid

Low Angle, Narrow Gap

[DFH6B-11A](/products/dfh6b-11a-ngk-iridium-double-fine-spark-plug-genuine-ngk-spark-plug) · [DILFR5A11](/products/dilfr5a11-ngk-iridium-double-fine-spark-plug-genuine-ngk-spark-plug) · DILFR5A11D · DILFR5C11D · [DILFR6D11](/products/dilfr6d11-ngk-iridium-double-fine-spark-plug-genuine-ngk-spark-plug) · [DILFR6J11](/products/dilfr6j11-ngk-iridium-double-fine-spark-plug-genuine-ngk-spark-plug) · [DILFR7B10G](/products/dilfr7b10g-ngk-iridium-double-fine-spark-plug-genuine-ngk-spark-plug) · [DILFR7K9G](/products/dilfr7k9g-ngk-iridium-double-fine-spark-plug-genuine-ngk-spark-plug)

Iridium

26.5mm Reach

5/8" Hex

Gasket, Solid

Projected, Wide Gap Dual Fine Electrode

[DIFR5C11](/products/difr5c11-ngk-iridium-double-fine-spark-plug-genuine-ngk-spark-plug) · [DIFR6C11](/products/difr6c11-ngk-iridium-double-fine-spark-plug-genuine-ngk-spark-plug) · [DIFR6D13](/products/difr6d13-ngk-iridium-double-fine-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected Dual Fine Electrode Wide Gap

[FR5EI](/products/fr5ei-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [FR6EI](/products/fr6ei-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · IFR5T-8N · IFR6B · [IFR6B-K](/products/ifr6b-k-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · IFR6Q-G · IFR7F-4D · IFR7F-8DS · [IFR7X7G](/products/ifr7x7g-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected FR-Series

FR9BI-11 · [IFR5D10](/products/ifr5d10-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · IFR5E11 · [IFR5G11](/products/ifr5g11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [IFR5G-11K](/products/ifr5g-11k-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [IFR5J11](/products/ifr5j11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · IFR5L11 · [IFR5N10](/products/ifr5n10-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [IFR5T11](/products/ifr5t11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [IFR6B11](/products/ifr6b11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected FR-Series Wide Gap

GR4IX · GR5IX

Iridium

3/4" Reach

13/16" Hex

Gasket, Solid

Projected

[IFR6D10](/products/ifr6d10-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [IFR6E11](/products/ifr6e11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · IFR6G-11K · [IFR6J11](/products/ifr6j11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · IFR6L11 · [IFR6T11](/products/ifr6t11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · IFR6V-10G · [IFR7G-11KS](/products/ifr7g-11ks-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · IFR7L11 · [IFR8H11](/products/ifr8h11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected FR-Series Wide Gap

IFR9H11

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected FR-Series Wide Gap

[ILFR5B11](/products/ilfr5b11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [ILFR5T11](/products/ilfr5t11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [ILFR6J-11K](/products/ilfr6j-11k-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [ILFR6T11](/products/ilfr6t11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [LFR5AIX-11](/products/lfr5aix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [LFR6AIX-11](/products/lfr6aix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [SILFR6A11](/products/silfr6a11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

26.5mm Reach

5/8" Hex

Gasket, Solid

Projected, Wide Gap

[ILFR6A](/products/ilfr6a-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [ILFR6B](/products/ilfr6b-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [ILFR6G-E](/products/ilfr6g-e-ngk-spark-plug) · [ILFR7H](/products/ilfr7h-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · LFR6AIX · [LFR7AIX](/products/lfr7aix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [SILFR6A](/products/silfr6a-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

26.5mm Reach

5/8" Hex

Gasket, Solid

Projected

[ILTR5B11](/products/iltr5b11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · ILTR5C11 · [ILTR5E11](/products/iltr5e11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · ILTR5K13 · ILTR5L11 · ILTR6B11 · [ILTR6E11](/products/iltr6e11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · LTR5BI-13 · LTR5IX-11 · [LTR6AI13](/products/ltr6ai13-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

25mm Reach

5/8" Hex

Tapered, Solid

Projected, Wide Gap

ILTR5D · ILTR5M9G · [ILTR6A-8G](/products/iltr6a-8g-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [ILTR6F9](/products/iltr6f9-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [ILTR6G8G](/products/iltr6g8g-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · ILTR6M9G · ILTR7E9 · ILTR7N8 · [LTR6BI-9](/products/ltr6bi-9-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · LTR6CI-8

Iridium

25mm Reach

5/8" Hex

Tapered, Solid

Projected

ILTR6H8G

Iridium

25mm Reach

5/8" Hex

Tapered, Loose

Projected

[ILZFR6D11](/products/ilzfr6d11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · LZFR5AIX-11E · [LZFR5BI-11](/products/lzfr5bi-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [LZFR5CI-11](/products/lzfr5ci-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

26.5mm Reach

5/8" Hex

Gasket, Solid

Wide Gap Extended Projection

[ILZTR6A8G](/products/ilztr6a8g-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

25mm Reach

5/8" Hex

Tapered, Solid

Extend Shell Extended Projection

[ITR4A15](/products/itr4a15-ngk-spark-plug) · [ITR5H13](/products/itr5h13-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [ITR6F13](/products/itr6f13-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [TR5AI-13](/products/tr5ai-13-ngk-spark-plug) · [TR55IX](/products/tr55ix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [TR65IX](/products/tr65ix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

.708" Reach

5/8" Hex

Tapered, Solid

Projected, Wide Gap

IZFR5B · [IZFR5G](/products/izfr5g-ngk-spark-plugs) · [IZFR5J](/products/izfr5j-spark-plug) · IZFR6J · [IZFR6N-E](/products/izfr6n-e-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [IZFR6Q](/products/izfr6q-spark-plug) · IZFR7M · ZFR5FIX-E

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Extended Projection

[IZFR5K11](/products/izfr5k11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · IZFR5L11 · [IZFR6F11](/products/izfr6f11-ngk-iridium-spark-plug) · [IZFR6H11](/products/izfr6h11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [IZFR6K11](/products/izfr6k-11-ngk-spark-plug) · [IZFR6K13](/products/izfr6k13-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [IZFR6K-11E](/products/izfr6k-11e-ngk-spark-plug) · [IZFR6K-11S](/products/izfr6k-11s-ngk-spark-plug) · ZFR5AIX-11 · [ZFR5FIX-11](/products/zfr5fix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Extended Projection Wide Gap

IZTR4A11 · [IZTR5B11](/products/iztr5b11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

.708" Reach

5/8" Hex

Tapered, Solid

Extended Projection Wide Gap

LTR6BI-13 · LTR6IX-11 · [LTR7IX-11](/products/ltr7ix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

25mm Reach

5/8" Hex

Tapered, Solid

Projected, Wide Gap

[LTR6DI-8](/products/ltr6di-8-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · LTR6IX · LTR61X · [SILTR6A7G](/products/siltr6a7g-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

25mm Reach

5/8" Hex

Tapered, Solid

Projected

[LZFR6AI](/products/lzfr6ai-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

26.5mm Reach

5/8" Hex

Gasket, Solid

Extended Projection

[LZTR4AIX-11](/products/lztr4aix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [LZTR5AIX-13](/products/lztr5aix-13-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · LZTR6AIX-13 · LZTR7AIX-13

Iridium

25mm Reach

5/8" Hex

Tapered, Solid

Extended Projection Wide Gap

[RE7C-L](/products/re7c-l-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

21mm Reach

13/16" Hex

Gasket, Solid

Slant/Slit

[RE9B-T](/products/re9b-t-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

19mm Reach

13/16" Hex

Gasket, Solid

Slant/Slit

[SIFR6A11](/products/sifr6a11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected PSPE Wide Gap

SILFR5A11 · [SILFR6C11](/products/silfr6c11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

26.5mm Reach

5/8" Hex

Gasket, Solid, PSPE

Projected, Wide Gap

[SILFR6B8](/products/silfr6b8-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

26.5mm Reach

5/8" Hex

Gasket, Solid

Projected, PSPE

TR4IX · [TR5IX](/products/tr5ix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [TR6IX](/products/tr6ix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [TR7IX](/products/tr7ix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [TR8IX](/products/tr8ix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

.708" Reach

5/8" Hex

Tapered, Solid

Projected

[TR5-1IX](/products/tr5-1ix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

.708" Reach

5/8" Hex

Tapered, Solid

Projected Extended Shell

TR45-1IX · TR55-1IX

Iridium

.708" Reach

5/8" Hex

Tapered, Solid

Projected Extended Shell Wide Gap

UR4IX · [UR5IX](/products/ur5ix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [UR6IX](/products/ur6ix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

.460" Reach

5/8" Hex

Tapered, Solid

Projected

UR45IX · [UR55IX](/products/ur55ix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

.460" Reach

5/8" Hex

Tapered, Solid

Projected, Wide Gap

[XR4IX](/products/xr4ix-ngk-iridium-spark-plug-genuine-ngk-spark-plug) · [XR5IX](/products/xr5ix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/8" Reach

13/16" Hex

Gasket, Solid

Projected

XR45IX

Iridium

3/8" Reach

13/16" Hex

Gasket, Solid

Projected, Wide Gap

YR55IX

Iridium

.460" Reach

5/8" Hex

Tapered, Solid

Wide Gap

ZFR5FIX-11E · ZFR6AIX-11S · [ZFR6FIX-11](/products/zfr6fix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Iridium

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Extended Projection Wide Gap

R5670-5 · [R5670-6](/products/r5670-6-ngk-racing-spark-plug-genuine-ngk-spark-plug) · [R5670-7](/products/r5670-7-ngk-standard-racing-spark-plug-genuine-ngk-spark-plug) · R5670-8 · R5670-9

NGK Racing

3/8" Reach

13/16" Hex

Gasket, Solid

Projected V-Power Non-Resistor

[R5673-6](/products/r5673-6-ngk-standard-racing-spark-plug-genuine-ngk-spark-plug) · [R5673-7](/products/r5673-7-ngk-standard-racing-spark-plug-genuine-ngk-spark-plug) · [R5673-8](/products/r5673-8-ngk-standard-racing-spark-plug-genuine-ngk-spark-plug)

NGK Racing

.460" Reach

5/8" Hex

V-Power

BCPR5EGP · BCPR5EP-8 · BCPR6EGP

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

JIS Projected

[BCPR5EP-11](/products/bcpr5ep-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [BCPR6EP-11](/products/bcpr6ep-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · BCPR6EP-N-8 · BCPR6EP-N-11 · [PFR5A-11](/products/pfr5a-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR6A-11](/products/pfr6a-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR6H-10](/products/pfr6h-10-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR7H-10](/products/pfr7h-10-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

JIS Projected Wide Gap

BKR5EGP · BKR6EGP · [BKR6EP-8](/products/bkr6ep-8-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected BK-Series

[BKR5EKPB-11](/products/bkr5ekpb-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [BKR6EKPB-11](/products/bkr6ekpb-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected 2-Ground Electrode Wide gap

[BKR5EKUP](/products/bkr5ekup-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected Semi-Surface Discharge

[BKR5EP-11](/products/bkr5ep-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [BKR6EP-11](/products/bkr6ep-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected BK-Series Wide Gap

[BKR6EQUP](/products/bkr6equp-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [BKR7EQUP](/products/bkr7equp-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

4-Ground Electrode

BPR5EGP · BPR6EGP

Platinum

3/4" Reach

13/16" Hex

Gasket, Loose

Projected

[BPR5EP-11](/products/bpr5ep-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · GR45GP · PGR5A-11 · [PGR5C-11](/products/pgr5c-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

13/16" Hex

Gasket, Solid

Projected, Wide Gap

[BUR7EQP](/products/bur7eqp-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [BUR9EQP](/products/bur9eqp-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

21.5 mm Reach

13/16" Hex

Gasket, Solid

4-Ground Electrode

FR4GP · FR5GP · [PFR6B](/products/pfr6b-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR6G](/products/pfr6g-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR6Q](/products/pfr6q-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · PFR7AB · [PFR7B](/products/pfr7b-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · PFR7N8DS · [PFR7Q](/products/pfr7q-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR7S8EG](/products/pfr7s8eg-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected FR-Series

FR5AP-10 · FR5AP-11 · FR5AP-11E · FR45GP · [PFR5B-11](/products/pfr5b-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · PFR5B-11B · PFR5C-11 · [PFR5G-11](/products/pfr5g-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR5G-13E](/products/pfr5g-13e-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR5J-11](/products/pfr5j-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected FR-Series Wide Gap

GR4GP · GR5GP · PGR6A · [PGR7A](/products/pgr7a-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

13/16" Hex

Gasket, Solid

Projected

[ITR6G9](/products/itr6g9-ngk-iridium-spark-plug-genuine-ngk-spark-plug)

Platinum

.708" Reach

5/8" Hex

Tapered, Loose

LFR6CGP · [PLFR6A-11](/products/plfr6a-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PLFR6C-10G](/products/plfr6c-10g-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

26.5mm Reach

5/8" Hex

Gasket, Solid

Projected, Wide Gap

LTR5GP · LTR6GP-8

Platinum

25mm Reach

5/8" Hex

Tapered, Solid

Projected

[LTR6BP13](/products/ltr6bp13-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · LTR6DP13 · LTR6GP · LTR7CP13 · [PLTR6A-10G](/products/pltr6a-10g-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PTR5A-13](/products/ptr5a-13-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

25mm Reach

5/8" Hex

Tapered, Solid

Projected, Wide Gap

LZFR5AGP-E · LZFR6AP116S · [PLZFR5B13EG](/products/plzfr5b13eg-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PLZFR6A-11S](/products/plzfr6a-11s-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

26.5mm Reach

5/8" Hex

Gasket, Solid

Wide Gap Extended Projection

LZTR4AGP · LZTR5AGP · [LZTR6AP11EG](/products/lztr6ap11eg-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PLZTR4A-13](/products/plztr4a-13-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PLZTR5A-13](/products/plztr5a-13-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

25mm Reach

5/8" Hex

Tapered, Solid

Extended Projection Wide Gap

PFR5L-11 · [PFR5N-11](/products/pfr5n-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR5R-11](/products/pfr5r-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR6B-11](/products/pfr6b-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR6G-11](/products/pfr6g-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · PFR6G-13 · PFR6G-13E · [PFR6J-11](/products/pfr6j-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · PFR6L-11 · PFR6L-13

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected FR-Series Wide Gap

[PFR6N-11](/products/pfr6n-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR6T-10G](/products/pfr6t-10g-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · PFR6U-11G · [PFR6X-11](/products/pfr6x-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · PFR7G-11 · [PFR7G-11S](/products/pfr7g-11s-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected FR-Series Wide Gap

[PFR6W-TG](/products/pfr6w-tg-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PFR7W-TG](/products/pfr7w-tg-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

3-Ground Electrode

[PFR8S8EG](/products/pfr8s8eg-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected FR-Series

[PLFER7A8EG](/products/plfer7a8eg-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

26.5mm Reach

5/8" Hex

Gasket, Solid

Projected

[PLFR5A-11](/products/plfr5a-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

26.5mm Reach

5/8" Hex

Gasket, Solid, PSPE

Projected, Wide Gap

PTR4B-15 · PTR4G-15 · [PTR5C-13](/products/ptr5c-13-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · PTR5D-13 · PTR5F-11 · [PTR6D-13](/products/ptr6d-13-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · TR5BP12 · TR6AP-13 · [TR6AP-13E](/products/tr6ap-13e-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · TR55GP

Platinum

.708" Reach

5/8" Hex

Tapered, Solid

Projected, Wide Gap

[PTR5D-10](/products/ptr5d-10-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · TR4GP · TR5GP · TR6GP

Platinum

.708" Reach

5/8" Hex

Tapered, Solid

Projected

[PZFR5D-11](/products/pzfr5d-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PZFR5F-11](/products/pzfr5f-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · PZFR5J-11 · PZFR5Q-11 · PZFR6E-11 · [PZFR6F-11](/products/pzfr6f-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [PZFR6J-11](/products/pzfr6j-11-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · [ZFR5LP-13G](/products/zfr5lp-13g-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · ZFR6AGP

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Extended Projection Wide Gap

PZFR5F · PZFR6F · [PZFR6H](/products/pzfr6h-ngk-platinum-spark-plug-genuine-ngk-spark-plug) · PZFR7G-G · ZFR5AP · ZFR5BGP · ZFR5EGP · ZFR5FGP · ZFR5FGP-8E · ZFR5FGP-E

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Extended Projection

[PZTR5A-15](/products/pztr5a-15-ngk-platinum-spark-plug-genuine-ngk-spark-plug)

Platinum

.708" Reach

5/8" Hex

Tapered, Solid

Extended Projection Wide Gap

TR5-1GP

Platinum

.708" Reach

5/8" Hex

Tapered, Solid

Projected Extended Shell

TR45-1GP · TR55-1GP

Platinum

.708" Reach

5/8" Hex

Tapered, Solid

Projected Extended Shell Wide Gap

UR4GP · UR5GP · UR6GP

Platinum

.460" Reach

5/8" Hex

Tapered, Solid

Projected

UR45GP

Platinum

.460" Reach

5/8" Hex

Tapered, Solid

Projected, Wide Gap

YR5GP

Platinum

.460" Reach

5/8" Hex

Tapered, Solid

ZFR6BGP-S · ZFR6FGP

Platinum

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Extended Projection

ZGR5AGP

Platinum

3/4" Reach

13/16" Hex

Gasket, Solid

Extended Projection

FR5AHX · FR6AHX-S

Ruthenium HX

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected Wide Gap Dual Fine Electrode

FR5AHX-E

Ruthenium HX

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected Dual Fine Electrode

FR6BHX-S · FR7BHX-S

Ruthenium HX

3/4" Reach

5/8 Hex

Gasket, Solid

ISO Projected PSPE

TR4BHX

Ruthenium HX

.708" Reach

5/8" Hex

Tapered, Solid

Projected PSPE

TR5AHX · TR6AHX

Ruthenium HX

.708" Reach

5/8" Hex

Tapered, Solid

Projected Wide Gap Dual Fine Electrode

[B2-LM](/products/b2-lm-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug) · [B4-LM](/products/b4-lm-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

3/8" Reach

13/16" Hex

Gasket, Loose

Compact

[B4-L](/products/b-4l-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B6-L](/products/b-6l-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

7/16" Reach

13/16" Hex

Gasket, Loose

[B4ES](/products/b4es-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B5ES](/products/b5es-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B6ES](/products/b6es-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B7ES](/products/b7es-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B8ES](/products/b8es-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B9ES](/products/b9es-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B10ES](/products/b10es-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

3/4" Reach

13/16" Hex

Gasket, Loose

[B4H](/products/b-4h-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B5HS](/products/b5hs-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B6HS](/products/b6hs-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B7HS](/products/b7hs-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B8HS](/products/b8hs-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B9HS](/products/b9hs-ngk-standard-spark-plug-genuine-ngk-spark-plug) · B10HS

Standard, non-resistor

1/2" Reach

13/16" Hex

Gasket, Loose

B6ES-11 · B7ES-11

Standard, non-resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Wide Gap

[B6HS-10](/products/b6hs-10-ngk-spark-plug) · [B7HS-10](/products/b7hs-10-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B8HS-10](/products/b8hs-10-ngk-spark-plug) · [B9HS-10](/products/b9hs-10-ngk-spark-plug)

Standard, non-resistor

1/2" Reach

13/16" Hex

Gasket, Loose

Wide Gap

[B6S](/products/b6s-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B7S](/products/b7s-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B8S](/products/b8s-ngk-standard-spark-plug) · B-2 · [B-4](/products/b-4-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

3/8" Reach

13/16" Hex

Gasket, Loose

B7ES SOLID · B8ES SOLID · B9ES SOLID

Standard, non-resistor

3/4" Reach

13/16" Hex

Gasket, Solid

[B8EFS](/products/b8efs-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [B9EFS](/products/b9efs-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

.708" Reach

5/8" Hex

Tapered, Loose

BCP4ES-11 · [BCP6ES-11](/products/bcp6es-11-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

3/4" Reach

5/8" Hex

Gasket, Solid

JIS Projected Wide Gap

[BCP5ES](/products/bcp5es-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BCP6ES](/products/bcp6es-ngk-spark-plug-genuine-ngk-spark-plug) · [BCP7ES](/products/bcp7es-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

3/4" Reach

5/8" Hex

Gasket, Solid

JIS Projected

BCP6ET

Standard, non-resistor

3/4" Reach

5/8" Hex

Gasket, Loose

3-Ground Electrode JIS Projected

[BM4A](/products/bm4a-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug) · [BM6A](/products/bm6a-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug) · [BM7A](/products/bm7a-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

3/8" Reach

3/4" Hex

Gasket, Loose

Compact

BM4A SOLID · BM6A SOLID

Standard, non-resistor

3/8" Reach

3/4" Hex

Gasket, Solid

Compact

[BM6F](/products/bm6f-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug) · [BM7F](/products/bm7f-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

3/8" Reach

5/8" Hex

Tapered, Loose

Compact

[BP4ES](/products/bp4es-ngk-spark-plug) · [BP5ES](/products/bp5es-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BP6ES](/products/bp6es-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BP7ES](/products/bp7es-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BP8ES](/products/bp8es-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BP9ES](/products/bp9es-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

3/4" Reach

13/16" Hex

Gasket, Loose

Projected

[BP4HS](/products/bp4hs-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BP5HS](/products/bp5hs-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BP6HS](/products/bp6hs-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BP7HS](/products/bp7hs-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BP8HS](/products/bp8hs-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

1/2" Reach

13/16" Hex

Gasket, Loose

Projected

BP4HS-10 · BP6HS-10 · [BP7HS-10](/products/bp7hs-10-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BP8HS-10](/products/bp8hs-10-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

1/2" Reach

13/16" Hex

Gasket, Loose

Projected, Wide Gap

BP5EA-L · BP5ES SOLID · BP6ES SOLID · BP7ES SOLID · BP8ES SOLID

Standard, non-resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Projected

[BP5ES-11](/products/bp5es-11-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BP6ES-11](/products/bp6es-11-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Projected, Wide Gap

[BP6ET](/products/bp6et-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

3/4" Reach

13/16" Hex

Gasket, Loose

3-Ground Electrode Projected

[BP7EFS](/products/bp7efs-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

.708" Reach

5/8" Hex

Tapered, Loose

Projected

[BP8HS-15](/products/bp8hs-15-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

1/2" Reach

13/16" Hex

Gasket, Solid

Projected, Wide Gap

[BPM4A](/products/bpm4a-ngk-compact-small-engine-spark-plug-genuine-ngk-spark-plug) · [BPM6A](/products/bpm6a-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug) · [BPM7A](/products/bpm7a-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

3/8" Reach

3/4" Hex

Gasket, Loose

Compact, Projected

BPM6A-10

Standard, non-resistor

3/8" Reach

3/4" Hex

Gasket, Solid

Compact, Projected Wide Gap

[BPM6F](/products/bpm6f-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

3/8" Reach

5/8" Hex

Tapered, Solid

Compact, Projected

BPM7A SOLID

Standard, non-resistor

3/8" Reach

3/4" Hex

Gasket, Solid

Compact, Projected

[BU8H](/products/bu8h-ngk-standard-spark-plug-genuine-ngk-spark-plug) · BUH · BUHX

Standard, non-resistor

1/2" Reach

13/16" Hex

Gasket, Solid

Surface Discharge

BUE

Standard, non-resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Surface Discharge

[BUHW](/products/buhw-ngk-spark-plug-33-97180q) · [BUHW-2](/products/buhw-2-ngk-spark-plug-per-each-champion-l78v-may-be-supplied) · [BUHXW-1](/products/buhxw-1-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, non-resistor

1/2" Reach

13/16" Hex

Gasket, Solid

Tungsten Electrode

[BCPR5ES](/products/bcpr5es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BCPR6ES](/products/bcpr6es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BCPR7ES](/products/bcpr7es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

5/8" Hex

Gasket, Solid

JIS Projected

[BCPR5ES-11](/products/bcpr5es-11-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BCPR6ES-11](/products/bcpr6es-11-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BCPR7ES-11](/products/bcpr7es-11-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

5/8" Hex

Gasket, Solid

JIS Projected Wide Gap

[BCPR7ET](/products/bcpr7et-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

5/8" Hex

Gasket, Loose

3-Ground Electrode JIS Projected

BKR4ESA-11 · [BKR5ES-11](/products/bkr5es-11-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · BKR5ESA-11 · [BKR6ES-11](/products/bkr6es-11-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BKR7ES-11](/products/bkr7es-11-spark-plug-ngk)

Standard, resistor

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected BK-Series Wide Gap

[BKR5EK](/products/bkr5ek-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BKR6EK](/products/bkr6ek-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BKR6EKC](/products/bkr6ekc-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BKR7EKC-N](/products/bkr7ekc-n-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected 2-Ground Electrode

[BKR5EKB-11](/products/bkr5ekb-11-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected 2-Ground Electrode Wide gap

[BKR5EKU](/products/bkr5eku-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BKR6EKU](/products/bkr6eku-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BKR6EKUB](/products/bkr6ekub-ngk-standard-spark-plug-genuine-ngk-spark-plug) · BKR6EKUE · [BKR7EKU](/products/bkr7eku-ngk-spark-plug)

Standard, resistor

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected Semi-Surface Discharge

BKR5ES · BKR6ES

Standard, resistor

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected BK-Series

BKR6EKE

Standard, resistor

3/4" Reach

5/8" Hex

Gasket, Loose

ISO Projected 2-Ground Electrode

[BKR6EQUA](/products/bkr6equa-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

5/8" Hex

Gasket, Solid

4-Ground Electrode

[BKUR6ET](/products/bkur6et-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BKUR6ET-10](/products/bkur6et-10-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BKUR6ETB](/products/bkur6etb-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BKUR7ET](/products/bkur7et-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

5/8" Hex

Gasket, Solid

3-Ground Electrode

[BMR2A](/products/bmr2a-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug) · [BMR4A](/products/bmr4a-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug) · [BMR6A](/products/bmr6a-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug) · [BMR7A](/products/bmr7a-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/8" Reach

3/4" Hex

Gasket, Loose

Compact

BMR2A SOLID · BMR4A SOLID · BMR6A SOLID

Standard, resistor

3/8" Reach

3/4" Hex

Gasket, Solid

Compact

BMR2A-10

Standard, resistor

3/8" Reach

3/4" Hex

Gasket, Loose

Compact, Wide Gap

BPMR4A SOLID · BPMR7A SOLID

Standard, resistor

3/8" Reach

3/4" Hex

Gasket, Solid

Compact, Projected

[BPMR4A-10](/products/bpmr4a-10-ngk-compact-resistor-spark-plug-genuine-ngk-spark-plug) · [BPMR6A-10](/products/bpmr6a-10-ngk-compact-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/8" Reach

3/4" Hex

Gasket, Solid

Compact, Projected Wide Gap

[BPMR6A](/products/bpmr6a-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug) · [BPMR7A](/products/bpmr7a-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/8" Reach

3/4" Hex

Gasket, Loose

Compact, Projected

[BPMR6F](/products/bpmr6f-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/8" Reach

5/8" Hex

Tapered, Loose

Compact, Projected

[BPR2ES](/products/bpr2es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR4ES](/products/bpr4es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR5ES](/products/bpr5es-ngk-spark-plug) · [BPR6ES](/products/bpr6es-ngk-spark-plug) · [BPR7ES](/products/bpr7es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR8ES](/products/bpr8es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Loose

Projected

BPR2ES SOLID · BPR4ES SOLID · BPR5ES SOLID · BPR6ES SOLID · BPR7ES SOLID · BPR9ES · GR9A-EG

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Projected

BPR4ES-11 · [BPR5ES-11](/products/bpr5es-11-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR6ES-11](/products/bpr6es-11-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · BPR7ES-11

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Projected, Wide Gap

BPR4ES-H

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Extended Thread Shell Projected

[BPR4HS](/products/bpr4hs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR5HS](/products/bpr5hs-ngk-standard-resistor-spark-plug) · [BPR6HS](/products/bpr6hs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR7HS](/products/bpr7hs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR8HS](/products/bpr8hs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

1/2" Reach

13/16" Hex

Gasket, Loose

Projected

[BPR4HS-10](/products/bpr4hs-10-ngk-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR6HS-10](/products/bpr6hs-10-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR7HS-10](/products/bpr7hs-10-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

1/2" Reach

13/16" Hex

Gasket, Loose

Projected, Wide Gap

[BPR5EFS-13](/products/bpr5efs-13-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · TR5C-12

Standard, resistor

.708" Reach

5/8" Hex

Tapered, Solid

Projected, Wide Gap

BPR5EKU

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Loose

Projected 2-Ground Electrode

[BPR6EFS](/products/bpr6efs-ngk-spark-plug)

Standard, resistor

.708" Reach

5/8" Hex

Tapered, Solid

Projected

[BPR6EKN](/products/bpr6ekn-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Projected 2-Ground Electrode

[BPR6FS](/products/bpr6fs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

.460" Reach

5/8" Hex

Tapered, Solid

Projected

BPR6HSA

Standard, resistor

1/2" Reach

13/16" Hex

Gasket, Stud

Projected

[BPZ8HS-10](/products/bpz8hs-10-ngk-spark-plugs) · [BPZ8HS-15](/products/bpz8hs-15-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

1/2" Reach

13/16" Hex

Gasket, Solid

Projected, Wide Gap Inductive Resistor

[BR2-LM](/products/br2-lm-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug) · [BR4-LM](/products/br4-lm-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/8" Reach

13/16" Hex

Gasket, Loose

Compact

BR2-LM SOLID

Standard, resistor

3/8" Reach

13/16" Hex

Gasket, Solid

Compact

BR4ES · [BR5ES](/products/br5es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BR6ES](/products/br6es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BR7ES](/products/br7es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BR8ES](/products/br8es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BR9ES](/products/br9es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BR10ES](/products/br10es-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Loose

[BR4HS](/products/br4hs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BR5HS](/products/br5hs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BR6HS](/products/br6hs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BR7HS](/products/br7hs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BR8HS](/products/br8hs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BR9HS](/products/br9hs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

1/2" Reach

13/16" Hex

Gasket, Loose

BR6ES-11 · [BR8ES-11](/products/br8es-11-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Wide Gap

[BR6FS](/products/br6fs-ngk-spark-plugs)

Standard, resistor

.460" Reach

5/8" Hex

Tapered, Solid

[BR6HS-10](/products/br6hs-10-ngk-standard-resistor-spark-plug) · [BR7HS-10](/products/br7hs-10-ngk-spark-plug) · [BR8HS-10](/products/br8hs-10-ngk-spark-plug) · [BR9HS-10](/products/br9hs-10-ngk-spark-plug)

Standard, resistor

1/2" Reach

13/16" Hex

Gasket, Loose

Wide Gap

BR6HSA · [BR8HSA](/products/br8hsa-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

1/2" Reach

13/16" Hex

Gasket, Stud

[BR6S](/products/br6s-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/8" Reach

13/16" Hex

Gasket, Loose

[BR7EFS](/products/br7efs-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

.708" Reach

5/8" Hex

Tapered, Solid

BR7ES SOLID · BR8ES SOLID · BR9ES SOLID · BR10ES SOLID

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Solid

BR7ET · [BR8ET](/products/br8et-ngk-standard-spark-plug-genuine-ngk-spark-plug) · BR9ET

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Solid

3-Ground Electrode

[BR8ECM](/products/br8ecm-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · [BR9ECM](/products/br9ecm-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug) · BR10ECM

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Compact

BR8ECS · BR9ECS · BR10ECS SOLID

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Low Angle

[BR8EQ-14](/products/br8eq-14-ngk-spark-plug-genuine-ngk-spark-plug) · BR9EQ-14

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Solid

4-Ground Electrode Wide Gap

[BR8HCS-10](/products/br8hcs-10-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

1/2" Reach

13/16" Hex

Gasket, Loose

Low Angle Ground Electrode Wide Gap

BR8HS SOLID

Standard, resistor

1/2" Reach

13/16" Hex

Gasket, Solid

BR9ECS-5

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Low Angle, Narrow Gap

BUR4EB-11 · BUR5EB-11 · BUR6EB-11 · BUR7EB-11

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Solid

Semi-Surface Discharge Wide Gap

[BUR6ET](/products/bur6et-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Loose

3-Ground Electrode Projected

[BUR7EQ](/products/bur7eq-ngk-standard-spark-plug-genuine-ngk-spark-plug) · [BUR9EQ](/products/bur9eq-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

21.5 mm Reach

13/16" Hex

Gasket, Solid

4-Ground Electrode

[BUZ8H](/products/buz8h-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

1/2" Reach

13/16" Hex

Gasket, Solid

Surface Discharge Inductive Resistor

BUZHW · BUZHW-2

Standard, resistor

1/2" Reach

13/16" Hex

Gasket, Solid

Tungsten Electrode Inductive Resistor

[BZ7HS-10](/products/bz7hs-10-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

1/2" Reach

13/16" Hex

Gasket, Solid

Inductive Resistor, Wide Gap

[FR2B-D](/products/fr2b-d-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected Partial Thread FR - Series

[LFR6D](/products/lfr6d-ngk-standard-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

26.5mm Reach

5/8" Hex

Gasket, Solid

3-Ground Electrode

[LZFR5C-11](/products/lzfr5c-11-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

26.5mm Reach

5/8" Hex

Gasket, Solid

Wide Gap Extended Projection

[ZGR5A](/products/zgr5a-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug)

Standard, resistor

3/4" Reach

13/16" Hex

Gasket, Loose

Extended Projection

B2LMY BL1 · B4LMY BL1

V-Power

3/8" Reach

13/16" Hex

Gasket, Loose

Compact

B6LY BL1

V-Power

7/16" Reach

13/16" Hex

Gasket, Loose

[BCPR5E-11](/products/bcpr5e-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BCPR5EY-11](/products/bcpr5ey-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BCPR6E-11](/products/bcpr6e-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BCPR6EY-11](/products/bcpr6ey-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · BCPR6EY-N-11 · BCPR7EY-11

V-Power

3/4" Reach

5/8" Hex

Gasket, Solid

JIS Projected Wide Gap

[BCPR5EY](/products/bcpr5ey-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BCPR6E](/products/bcpr6e-ngk-spark-plug)

V-Power

3/4" Reach

5/8" Hex

Gasket, Solid

JIS Projected

BKR4E · [BKR5E](/products/bkr5e-ngk-spark-plug) · [BKR5EY](/products/bkr5ey-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BKR5EYA](/products/bkr5eya-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BKR6E](/products/bkr6e-ngk-spark-plug) · [BKR6EY](/products/bkr6ey-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BKR6EYA](/products/bkr6eya-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BKR6EZB](/products/bkr6ezb-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BKR7E](/products/bkr7e-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · BKR7E-E

V-Power

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected BK-Series

[BKR4E-11](/products/bkr4e-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BKR5E-11](/products/bkr5e-11-ngk-spark-plug) · BKR5E-N-11 · [BKR5EY-11](/products/bkr5ey-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BKR5EYA-11](/products/bkr5eya-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BKR6E-11](/products/bkr6e-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BKR6E-N-11](/products/bkr6e-n-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BKR7E-11](/products/bkr7e-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug)

V-Power

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected BK-Series Wide Gap

BM4Y BL1 · BM6Y BL1 · BM7Y BL1

V-Power

3/8" Reach

3/4" Hex

Gasket, Loose

Compact

BM6FY BL1

V-Power

3/8" Reach

5/8" Hex

Tapered, Loose

Compact

[BP5EY](/products/bp5ey-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · BPR5EY BL1 · BPR6EY BL1

V-Power

3/4" Reach

13/16" Hex

Gasket, Loose

Projected

[BP6EY](/products/bp6ey-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR4EY](/products/bpr4ey-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR5EY](/products/bpr5ey-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR6EY](/products/bpr6ey-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · GR4 · GR5

V-Power

3/4" Reach

13/16" Hex

Gasket, Solid

Projected

[BP8H-N-10](/products/bp8h-n-10-ngk-spark-plug)

V-Power

1/2" Reach

13/16" Hex

Gasket, Solid

Projected, Wide Gap

BPM6Y · BPM7Y · BPM7Y BL1

V-Power

3/8" Reach

3/4" Hex

Gasket, Loose

Compact, Projected

BPM8Y S25 SOLID · BPM8Y SOLID · BPMR6Y BL1 · BPMR7Y · [BPMR8Y](/products/bpmr8y-ngk-standard-compact-spark-plug-genuine-ngk-spark-plug)

V-Power

3/8" Reach

3/4" Hex

Gasket, Solid

Compact, Projected

[BPR5EY-11](/products/bpr5ey-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BPR6EY-11](/products/bpr6ey-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · GR45

V-Power

3/4" Reach

13/16" Hex

Gasket, Solid

Projected, Wide Gap

[BPZ8H-N-10](/products/bpz8h-n-10-ngk-spark-plug)

V-Power

1/2" Reach

13/16" Hex

Gasket, Solid

Projected, Wide Gap Inductive Resistor

BR6EB-L-11

V-Power

3/4" Reach

13/16" Hex

Gasket, Solid

Wide Gap

[BR6EF](/products/br6ef-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [BR7EF](/products/br7ef-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug)

V-Power

.708" Reach

5/8" Hex

Tapered, Solid

BR9EYA · BR10EYA

V-Power

3/4" Reach

13/16" Hex

Gasket, Solid

BUR6EA-11 · BUR7EA-11

V-Power

3/4" Reach

13/16" Hex

Gasket, Solid

Semi-Surface Discharge Wide Gap

FR4 · FR5

V-Power

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected FR-Series

[FR5-1](/products/fr5-1-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug)

V-Power

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Extended Projection Extended Shell Projection

FR45

V-Power

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Projected FR-Series Wide Gap

[LFR4A-E](/products/lfr4a-e-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [LFR6A](/products/lfr6a-ngk-spark-plug)

V-Power

26.5mm Reach

5/8" Hex

Gasket, Solid

Projected

[LFR5A-11](/products/lfr5a-11-ngk-spark-plug) · [LFR6A-11](/products/lfr6a-11-ngk-spark-plug) · [LFR6C-11](/products/lfr6c-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug)

V-Power

26.5mm Reach

5/8" Hex

Gasket, Solid

Projected, Wide Gap

[LZTR4A-11](/products/lztr4a-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [LZTR5A-13](/products/lztr5a-13-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug)

V-Power

25mm Reach

5/8" Hex

Tapered, Solid

Extended Projection Wide Gap

[TR4](/products/tr4-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · TR5 · [TR6](/products/tr6-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug)

V-Power

.708" Reach

5/8" Hex

Tapered, Solid

Projected

TR5-1

V-Power

.708" Reach

5/8" Hex

Tapered, Solid

Projected Extended Shell

TR55

V-Power

.708" Reach

5/8" Hex

Tapered, Solid

Projected, Wide Gap

[TR55-1](/products/tr55-1-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug)

V-Power

.708" Reach

5/8" Hex

Tapered, Solid

Projected Extended Shell Wide Gap

UR4 · UR5 · UR6

V-Power

.460" Reach

5/8" Hex

Tapered, Solid

Projected

UR45 · UR55

V-Power

.460" Reach

5/8" Hex

Tapered, Solid

Projected, Wide Gap

XR4 · XR5

V-Power

3/8" Reach

13/16" Hex

Gasket, Solid

Projected

XR45

V-Power

3/8" Reach

13/16" Hex

Gasket, Solid

Projected, Wide Gap

YR5

V-Power

.460" Reach

5/8" Hex

Tapered, Solid

YR55

V-Power

.460" Reach

5/8" Hex

Tapered, Solid

Wide Gap

[ZFR4F-11](/products/zfr4f-11-ngk-spark-plug) · [ZFR5A-11](/products/zfr5a-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · ZFR5D-11 · [ZFR5E-11](/products/zfr5e-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [ZFR5F-11](/products/zfr5f-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [ZFR5J-11](/products/zfr5j-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [ZFR6A-11](/products/zfr6a-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [ZFR6F-11](/products/zfr6f-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [ZFR6F-11G](/products/zfr6f-11g-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [ZFR6J-11](/products/zfr6j-11-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug)

V-Power

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Extended Projection Wide Gap

[ZFR5F](/products/zfr5f-ngk-spark-plug) · ZFR5F-4 · [ZFR5N](/products/zfr5n-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [ZFR7F](/products/zfr7f-ngk-spark-plug)

V-Power

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Extended Projection

[ZFR6K-9E](/products/zfr6k-9e-ngk-spark-plug) · [ZFR6U-9](/products/zfr6u-9-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug) · [ZFR7F-11](/products/zfr7f-11-ngk-spark-plug)

V-Power

3/4" Reach

5/8" Hex

Gasket, Solid

ISO Extended Projection Wide Gap

ZGR5A-4

V-Power

3/4" Reach

13/16" Hex

Gasket, Solid

Extended Projection

[ZGR5C](/products/zgr5c-ngk-std-v-groove-resistor-spark-plug-genuine-ngk-spark-plug)

V-Power

3/4" Reach

13/16" Hex

Gasket, Solid

Extended Projection Extended Shell

### Reading the specification

**Reach** is the threaded length that screws into the head. **Hex** is the spanner size — 5/8" and 13/16" are the two common plug sockets. **Seat** is how the plug seals: a gasket seat uses a captive washer, a tapered seat seals on the cone and takes no washer. _Solid_ and _loose_ describe the gasket, and _stud_ means the terminal nut screws off so the plug takes either a threaded or a push-on cap.

**Projected** means the insulator nose reaches further into the chamber, which suits engines designed for it and can foul or contact in engines that are not. **Wide gap** plugs come pre-gapped wider for high-energy ignition systems. Fit what the engine manufacturer specifies rather than substituting on dimensions alone.

### Other reference tables

-   [8mm, 10mm, 12mm, 18mm & Racing Plugs](/pages/ngk-spark-plug-specifications-small-thread)
-   [Denso cross reference](/pages/ngk-cross-reference-denso)
-   [Champion cross reference](/pages/ngk-cross-reference-champion)
-   [Bosch cross reference](/pages/ngk-cross-reference-bosch)
-   [Autolite & Motorcraft cross reference](/pages/ngk-cross-reference-autolite-motorcraft)
-   [ACDelco & Torch cross reference](/pages/ngk-cross-reference-acdelco)
-   [Other brands & OEM cross reference](/pages/ngk-cross-reference-other-brands)
-   [All reference charts](/pages/resources)

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/pages/ngk-spark-plug-specifications)