# 993909 Hexagon Screw | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta hexagon screw weighing 0.181 kg and listed for 10 applications on D series engines. It supersedes part number 955374. The neighbouring screw 993908 replaces 955373 at 0.165 kg on TAMD engines - two consecutive numbers replacing two consecutive old ones, so it is easy to order the wrong one of the pair.

## ⚙️ Key Features

-   0.181 kg
-   Listed for 10 applications
-   Fits D series engines
-   Supersedes 955374

## 🔌 Function

Clamps two components together, tightened by a spanner or socket on its hexagon head.

## ⚠️ Common Signs of Failure

-   Joint loosening or the screw backing out
-   Shank stretched, with a visible waist
-   Head corners rounded
-   Thread stripped or picked up

## 🛠️ Service Notes

-   Check the engine family as well as the number - 993909 replaces 955374 on D engines, while 993908 replaces 955373 on TAMD engines
-   Fit new rather than reusing a strained screw

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   993909 → Supersedes 955374 → Supersedes 3589468

### OEM / Related Numbers

-   955374 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 15.77 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 15.77 AUD | In stock |

## Images

- 993909 Hexagon Screw | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/993909-hexagon-screw-genuine-volvo-penta)
> Updated: 2026-10-11