# 6637511 Nut | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta nut from the Fuel System group, weighing 0.002 kg and listed for 9 applications across TMD, MS, TAMD and MD series engines. It belongs to the same fuel line connection set as sleeve 6634735, banjo nipple 6613554 and hollow screw 6642578.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TMD22A
-   Volvo Penta TMD22B
-   Volvo Penta TMD22P-C
-   Volvo Penta MS2B-A
-   Volvo Penta TAMD22P-B
-   Volvo Penta MD22
-   Volvo Penta MD22A
-   Volvo Penta MD22L
-   Volvo Penta MD22P

-   **Engine Family:** TMD, MS, TAMD, MD

## ⚙️ Key Features

-   0.002 kg
-   9 applications across TMD, MS, TAMD and MD series engines
-   Fitted with sleeve 6634735 in the same connection

## 🔌 Function

Draws the fuel line joint together and holds the sealing sleeve tight against its seat.

## ⚠️ Common Signs of Failure

-   Fuel weeping at the union despite tightening
-   Nut thread stripped or galled
-   Hex rounded off from a slipping spanner
-   Nut corroded onto the fitting
-   Air drawn into the fuel system, giving hard starting

## 🛠️ Service Notes

-   Renew sleeve 6634735 with the nut when the joint is remade
-   Tighten to a firm seal rather than as hard as possible, as over-tightening cones the sealing faces
-   Bleed the fuel system after any line is opened

## 📦 Condition

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

## Details

- **Price:** 19.09 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 19.09 AUD | In stock |

## Images

- 6637511 Nut | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/6637511-nut-genuine-volvo-penta)
> Updated: 2026-09-19