# 21246409 Flange Nut | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Flange Nut - Part Number: 21246409

  

Genuine flanged retaining nut used in the seawater-pump drive and mechanical fuel-control assemblies of Volvo Penta compact marine diesel engines. The integrated flange distributes the clamping force over the adjoining component.

  

⚙️ Key Features

  

• Genuine Volvo Penta flange nut

• Integrated load-spreading flange

• Used in seawater-pump and governor assemblies

• Correct OEM thread and locking profile

• Suitable for continuous marine-engine vibration

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• Current OEM reference: 21246409

  

OEM / Related Numbers:

  

• 21246409

  

Related Seawater-Pump Parts:

  

• Seawater Pump: 3593654

• Pump Drive Gear: 3580062

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Confirmed applications include:

  

• D1-13B seawater-pump assembly

• D1-13F

• D1-20F

• D1-30F

• D2-40F governor and fuel-regulation assemblies

  

🔌 Function

  

The nut retains the designated shaft, gear or control component while its flange spreads the tightening load across the mating surface.

  

Common signs that replacement is required:

  

• Damaged threads

• Rounded flats

• Distorted flange

• Nut repeatedly loosening

• Corrosion or galling

• Inability to reach or retain specified torque

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 4.55 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 4.55 AUD | In stock |

## Images

- 21246409 Flange Nut | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21246409-flange-nut-genuine-volvo-penta)
> Updated: 2026-08-02