# 994780 Six Point Socket Screw | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta six point socket screw 16 mm long, weighing 0.007 kg and listed for 50 applications on D series engines. It supersedes part number 969407, which was catalogued earlier as a hexagon screw, so the head drive has changed and the original spanner will no longer fit.

## 🚤 Compatibility

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

Full model list at the end of this description.

## ⚙️ Key Features

-   16 mm long
-   0.007 kg
-   Supersedes 969407, catalogued earlier as a hexagon screw
-   50 applications on D series engines
-   Quantity varies by assembly, most commonly two
-   Also supersedes Volvo part numbers 100054, 240634 and 902227

## 🔌 Function

Clamps a joint where there is little spanner access, the six point socket taking the tightening torque.

## ⚠️ Common Signs of Failure

-   Screw backing off or found missing at service
-   Socket rounded by a poor-fitting key
-   Thread stretched or stripped on removal
-   Corrosion or seizure making the screw hard to shift

## 🛠️ Service Notes

-   This block runs in lengths - 994784 is 12 mm, this one 16 mm and 994782 is 25 mm, so order by the measured length rather than by weight
-   994787 is also published at 0.007 kg but carries no stated length, so mass will not tell the two apart

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   994780 → Supersedes 969407 → Supersedes 956078

### OEM / Related Numbers

-   969407 earlier number superseded by this part
-   969569 earlier number superseded by this part
-   955246 earlier number superseded by this part
-   956078 earlier number superseded by this part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 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 D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G, D4-145I-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 D8A2-A MP, D8A5-A MH, D8A6-A MH, D8A5-A MG, D8A6-A MG, D8A4-A MP, D8A1-A MP, D8A3-A MP
-   Volvo Penta D13C4-B MH, D13C1-B MH, D13C4-B MP, D13C5-B MP, D13C8-B MP

## Details

- **Price:** 0.68 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 0.68 AUD | In stock |

## Images

- 994780 Six Point Socket Screw | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/994780-six-point-socket-screw-genuine-volvo-penta)
> Updated: 2026-09-19