# 20517048 Hexagon Nut | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Hexagon Nut - Part Number: 20517048

  

This genuine Volvo Penta hexagon nut is an OEM service component used in the Inlet / Exhaust Hexagon Nut. It is manufactured to the original Volvo Penta dimensional, material and interface requirements for the documented Volvo Penta TD/TAD4-7 industrial diesel application. Technical identification: High-temperature hexagon nut used on the turbocharger/exhaust mounting stud. In service, it provides the specified clamp load and mechanical retention for the associated assembly. Selection must be confirmed by OEM part number 20517048, the exact model/product number, serial number and installed assembly configuration.

  

⚙️ Key Features

  

• Genuine Volvo Penta OEM hexagon nut

• OEM part number 20517048

• Documented application: Inlet / Exhaust Hexagon Nut

• Validated engine/application family: Volvo Penta TD/TAD4-7 industrial diesel

• Technical distinction: High-temperature hexagon nut used on the turbocharger/exhaust mounting stud

• Primary function: Provides the specified clamp load and mechanical retention for the associated assembly.

• Confirm dimensions, thread and strength class, inspect mating threads/contact faces and tighten to the Volvo Penta torque and locking specification.

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 20517048 (current/original OEM service reference)

  

OEM / Related Numbers:

  

• 20517048

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Inlet / Exhaust Hexagon Nut

  

Typically suits:

  

• Engine / product models:

• TAD420VE

• TD520GE

• TD720GE

• TAD530GE

• TAD531GE

• TAD532GE

• TAD730GE

• TAD731GE

  

• Engine / Application Family: Volvo Penta TD/TAD4-7 industrial diesel

• Serial / Configuration Note: Confirm thread, strength class and exact manifold/turbo mounting position.

  

🔌 Function

  

Provides the specified clamp load and mechanical retention for the associated assembly. Confirm dimensions, thread and strength class, inspect mating threads/contact faces and tighten to the Volvo Penta torque and locking specification.

  

Common signs of failure:

  

• Loosening, fretting or movement at the retained joint

• Damaged threads, rounded flats, cracking or permanent distortion

• Loss of clamp load or incorrect alignment of the mounted component

• Corrosion, heat damage or contact-face wear

• Repeat failure caused by wrong torque or damaged mating parts

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 1.95 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1.95 AUD | In stock |

## Images

- 20517048 Hexagon Nut | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20517048-hexagon-nut-genuine-volvo-penta)
> Updated: 2026-07-30