# 20412308 Hexagon Nut | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Turbocharger Mounting Hexagon Nut - Part Number: 20412308

  

Genuine Volvo Penta hexagon nut used in sets of four on the turbocharger mounting studs of D7 low-mounted turbo installations. It clamps the turbocharger to the exhaust manifold with the specified washers and nut retainers.

  

⚙️ Key Features

  

• High-temperature turbocharger mounting nut

• Four used with studs 20412314

• Used with washers 20799731 and nut retainers 20505959

• Confirmed with turbocharger 20500295 / exchange 3802178 and related variants

• Tightening procedure must follow the workshop specification

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 20412308 - current Volvo Penta turbocharger nut reference

  

OEM / Related Numbers:

  

• 20412314 - turbocharger mounting studs

• 20799731 - washers

• 20505959 - nut retainers

• 20500295 / 3802178 - related turbocharger

• 20405970 - turbocharger gasket

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta D7 exhaust manifold and turbocharger mountings

  

Typically suits:

  

• Engine / equipment models:

• TAD720VE

• TAD721VE

• TAD722VE

• TD720GE

• TAD730GE

• TAD731GE

• TAD732GE

• TAD733GE

  

• Engine Type: Volvo Penta 7-litre turbocharged industrial diesel

• Year / Serial Range: Turbocharger module and engine serial-number dependent

  

🔌 Function

  

Provides the clamp load securing the turbocharger to the exhaust manifold.

  

Common signs of failure:

  

• Exhaust leakage or soot at the turbo flange

• Nut loosening under heat cycling

• Damaged or seized threads

• Unable to reach specified torque

• Turbocharger flange movement

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 2.79 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2.79 AUD | In stock |

## Images

- 20412308 Hexagon Nut | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20412308-hexagon-nut-genuine-volvo-penta)
> Updated: 2026-07-29