# D8HA NGK Standard Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Standard Spark Plug – Part Number: D8HA**

Spark plugs are a critical engine component, providing the spark that ignites the air-fuel mixture that drives an engine. NGK spark plugs feature trivalent plating – a silver/chrome-coloured finish on the threads – for corrosion resistance against moisture and chemicals, and are designed to meet or exceed OE standards.

## ⚙️ Key Features

-   Standard nickel centre electrode
-   Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
-   Corrugated ribs reduce the risk of flashover
-   Pure alumina silicate ceramic insulator, providing superior strength and better heat transfer
-   Copper core aids in heat removal
-   Triple seals prevent leakage

## 📏 Specifications

-   NGK stock number: 7112
-   Thread: 12 mm
-   Reach: 12.7 mm (1/2 in)
-   Hex: 18 mm
-   Seat: Gasket
-   Terminal: Threaded stud

## 🚘 Application

Listed in NGK's application charts for marine, motorcycle, ATV and snowmobile equipment. The chart shows a 0.5 mm gap for these engines, but check it against your engine's manual before fitting.

-   Honda CA77 (305, 1969-1962) – Motorcycle
-   Honda CB77 (305, 1968-1962) – Motorcycle
-   Honda CL77 (305, 1968-1965) – Motorcycle
-   Honda CA72 (250, 1966-1962) – Motorcycle
-   Honda CB72 (250, 1966-1962) – Motorcycle
-   Honda CL72 (250, 1965-1962) – Motorcycle
-   Honda CA175 (175, 1970-1968) – Motorcycle
-   Honda CB175 (175, 1973-1969) – Motorcycle
-   Honda CL175 (175, 1973-1968) – Motorcycle
-   Honda SL175 (175, 1972-1970) – Motorcycle
-   Honda CA95 (150, 1966-1962) – Motorcycle
-   Honda CA200 (90, 1966-1963) – Motorcycle
-   Honda CM91 (90, 1969-1966) – Motorcycle
-   Honda CT200 (90, 1966-1964) – Motorcycle
-   Honda CT90 (90, 1979-1966) – Motorcycle
-   Honda SL90 (90, 1969) – Motorcycle
-   Yumbo F3000 (125, 2004) – Motorcycle
-   Yumbo ROAD POWER (125, 2004) – Motorcycle
-   Yumbo ROAD POWER 4S (50, 2004) – Motorcycle
-   Honda ATC110 (110, 1981-1979) – ATV
-   Honda ATC90 (90, 1978-1970) – ATV

## 🔄 Supersession & Cross Reference

NGK's cross-reference tables list this plug against these part numbers.

-   DENSO: 4103, 4104, X24FS-U, X24FS-ZU
-   ACDelco: MC122F, S121F, S122F
-   Champion: 816, P7, P76
-   Autolite: 2715, 4173
-   Motorcraft: HE2, HV2
-   Magneti Marelli: CX8N
-   Torch: C8C

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 13.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 13.00 AUD | In stock |

## Images

- D8HA NGK spark plug
- D8HA NGK spark plug firing end

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/d8ha-ngk-standard-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03