# 990948 Flange Lock Nut | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta flange lock nut weighing 0.045 kg and listed for 86 applications across the D and V ranges. It supersedes part number 949874.

## 🚤 Compatibility

-   **Engine Family:** D, V
-   **HP Range:** 175-480 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   0.045 kg
-   86 applications across the D and V ranges
-   Supersedes 949874
-   Flange and locking feature in one nut
-   Quantity varies by assembly, most commonly four
-   Also supersedes Volvo part numbers 4776940 and 4804283

## 🔌 Function

Combines a load-spreading flange with a locking feature, so the nut both seats squarely and resists working loose under vibration.

## ⚠️ Common Signs of Failure

-   Nut found loose or missing
-   Nut spinning freely down the thread by hand, showing the locking action has gone
-   Flange face flattened
-   Thread stripped or crossed on removal

## 🛠️ Service Notes

-   Treat it as single use - once the locking feature has been pulled up and released it will not hold to the same figure again
-   Never substitute a plain nut and washer for a flange lock nut on a joint that specifies one

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   990948 → Supersedes 949874 → Supersedes 4952322

### OEM / Related Numbers

-   949874 earlier number superseded by this part

## 📦 Condition

-   Genuine Volvo Penta part
-   Brand new
-   Supplied in original or equivalent packaging

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D13C3-B MH, D13C1-B MH, D13C4-B MH, D13B-E MG, D13B-F MG, D13B-N MH, D13C6-A MP, D13C1-A MH, D13C2-A MH, D13C4-B MP, D13C5-B MP, D13C1-B MG, D13C3-B MG, D13C2-B MG, D13C4-B MG, D13C5-A MP, D13C2-A MG, D13C1-A MG, D13C8-B MP
-   Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-400A-G, D6-440A-G, D6-300I-G, D6-480A-G
-   Volvo Penta V8-350-C-R, V8-350-CE-R, V8-300-C-R, V8-300-CE-R, V8-300-C-P, V8-300-CE-P, V8-350-C-P, V8-350-CE-P, V8-380-C-P, V8-380-CE-P, V8-430-C-P, V8-430-CE-P, V8-300-C-S, V8-300-CE-S, V8-350-C-S, V8-350-CE-S, V8-400-CE-R
-   Volvo Penta D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G
-   Volvo Penta D16C1-E MG, D16C1-F MG, D16C2-E MG, D16C2-F MG, D16C1-E MH, D16C1-F MH, D16C2-E MH, D16C2-F MH
-   Volvo Penta D8A5-A MH, D8A6-A MH, D8A5-A MG, D8A6-A MG, D8A4-A MP, D8A3-A MP, D8A7-A MP, D8A8-A MP
-   Volvo Penta V6-200-CE-P, V6-250-CE-P, V6-280-CE-P, V6-250-CE-R, V6-280-CE-R
-   Volvo Penta D11C3-A MP, D11C4-A MP

## Details

- **Price:** 0.69 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 0.69 AUD | In stock |

## Images

- 990948 Flange Lock Nut | Genuine Volvo Penta Part
- 990948 Flange Lock Nut | Genuine Volvo Penta Part - photo 2 of 2

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/990948-flange-lock-nut-genuine-volvo-penta)
> Updated: 2026-09-19