# 990952 Flange Lock Nut | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta flange lock nut weighing 0.043 kg and listed for 49 applications across the D, TAD and EPT ranges. It replaces part numbers 3827323 and 971099.

## 🚤 Compatibility

-   **Engine Family:** D, TAD, EPT

Full model list at the end of this description.

## ⚙️ Key Features

-   0.043 kg
-   49 applications across the D, TAD and EPT ranges
-   Replaces 3827323 and 971099
-   Flange and locking feature in one nut
-   Quantity varies by assembly, most commonly two
-   Also supersedes Volvo part numbers 3826296, 3826689 and 866780

## 🔌 Function

Locks a threaded joint with a load-spreading flange and a locking feature that resists the nut turning back.

## ⚠️ Common Signs of Failure

-   Joint loosening under vibration
-   Nut running down the thread freely by hand
-   Flange face picked up or flattened
-   Thread galled or stripped on removal

## 🛠️ Service Notes

-   Two earlier numbers, 3827323 and 971099, both come through as this nut
-   Use a new nut on reassembly and pull it up to the figure for the joint rather than to the point where the locking feature stops resisting

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   990952 → Supersedes 3827323

### OEM / Related Numbers

-   971099 earlier number superseded by this part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, D13C2-B MP, D13C1-A MP, D13C2-A MP, D13C3-A MP, D13C4-A MP, D13B-E MG, D13B-E MG (FE), D13B-E MH, D13B-E MH (FE), D13B-F MG, D13B-F MG (FE), D13B-N MH, D13B-N MH (FE), D13C4-B MP, D13C5-B MP, D13C6-A MP, D13C1-A MH, D13C2-A MH, D13C1-B MG, D13C3-B MG, D13C2-B MG, D13C4-B MG, D13C5-A MP, D13C2-A MG, D13C1-A MG, D13C7-B MP, D13C8-B MP, D13C9-A MP
-   Volvo Penta TAD1640-42GE-B, TAD1640GE, TAD1640-42VE-C
-   Volvo Penta TAD1641GE, TAD1641VE
-   Volvo Penta TAD1642GE, TAD1642VE
-   Volvo Penta TAD1643VE-B, TAD1643VE
-   Volvo Penta EPT802
-   Volvo Penta TAD1341-43GE-B
-   Volvo Penta TAD1344-45GE-B
-   Volvo Penta TAD1346GE
-   Volvo Penta TAD1371-75VE
-   Volvo Penta TAD1380-82GE
-   Volvo Penta TAD1381-85VE
-   Volvo Penta TAD1384-85VE-IWP
-   Volvo Penta TAD1650VE-B/51VE

## Details

- **Price:** 3.34 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3.34 AUD | In stock |

## Images

- 990952 Flange Lock Nut | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/990952-flange-lock-nut-genuine-volvo-penta)
> Updated: 2026-09-06