# 20405288 Hexagon Nut | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Oil Pan / Oil Pump Retaining Hexagon Nut - Part Number: 20405288

  

Genuine Volvo Penta hexagon nut used in the lubricating-oil pan and oil-pump hardware on TAD540VE, TAD541VE and TAD542VE engines. The nut must be installed at the exact schematic position and tightened to the specified torque.

  

⚙️ Key Features

  

• Factory hexagon retaining nut

• Confirmed in TAD540-TAD542 lubricating-oil assemblies

• Correct thread and strength grade for the original stud or bolt

• Used in oil-pan, pickup or oil-pump mounting hardware

• Replace if threads or locking faces are damaged

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 20405288 - current Volvo Penta hexagon-nut reference

  

OEM / Related Numbers:

  

• Associated stud, washer and oil-system component are schematic-position dependent

  

Aftermarket / Verified Equivalents:

  

• None confirmed

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta TAD5 lubricating-oil pan and pump systems

  

Typically suits:

  

• Engine / equipment models:

• TAD540VE

• TAD541VE

• TAD542VE

  

• Engine Type: Volvo Penta 5-litre industrial diesel

• Year / Serial Range: Oil-system position and engine serial-number dependent

  

🔌 Function

  

Secures the assigned oil-pan, pickup or pump component at the required clamp load.

  

Common signs of failure:

  

• Nut loosening in service

• Damaged or stretched threads

• Oil leakage caused by lost clamp load

• Rounded hexagon flats

• Unable to reach the specified tightening torque

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 111.38 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 111.38 AUD | In stock |

## Images

- 20405288 Hexagon Nut | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20405288-hexagon-nut-genuine-volvo-penta)
> Updated: 2026-07-29