# 984990 Hexagon Nut | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta hexagon nut, included in kits 3808886 and 3808887, weighing 0.005 kg and listed for 27 applications on D series engines.

## 🚤 Compatibility

-   **Engine Family:** D
-   **HP Range:** 145-480 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   Included in kits 3808886 and 3808887
-   0.005 kg
-   27 applications on D series engines
-   Also available on its own
-   8 used per assembly

## 📋 Kit Contents

-   Included in kit 3808886 and 3808887

## 🔌 Function

Locks onto the stud or screw thread to clamp the joint together.

## ⚠️ Common Signs of Failure

-   Nut backing off, leaving the joint slack
-   Thread damaged, crossed or seized to the stud
-   Corners rounded so a spanner slips
-   Rust staining running from the joint

## 🛠️ Service Notes

-   Toothed washer 984991 shares the same two kits and the same 27 applications, so the two are fitted together. Order the pair, or take kit 3808886 or 3808887 which contains both
-   If the joint has been working loose, renew the washer as well as the nut, because a flattened washer will not hold the new nut

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   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
-   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, D4-145I-G

## Details

- **Price:** 2.18 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2.18 AUD | In stock |

## Images

- 984990 Hexagon Nut | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/984990-hexagon-nut-genuine-volvo-penta)
> Updated: 2026-09-22