# 20405724 Six Point Screw | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta six-point screw used in a set of four to secure crankshaft V-belt pulley 20405725 and the related vibration-damper assembly.

## 🚤 Compatibility

-   **Engine Family:** D, TD, TAD, MD

Full model list at the end of this description.

## ⚙️ Key Features

-   High-strength six-point pulley screw
-   Four used in the crankshaft pulley assembly
-   Works with locating spring pin 20405634
-   Secures pulley 20405725 and related damper components
-   Requires the specified tightening sequence and torque
-   Engine type: Volvo Penta four- and six-cylinder industrial diesel
-   4 used per assembly

## 🔌 Function

Clamps the crankshaft pulley and damper components securely to the crankshaft hub.

## ⚠️ Common Signs of Failure

-   Pulley wobble or fretting
-   Repeated screw loosening
-   Rounded six-point head
-   Stretched or damaged threads
-   Front-engine vibration

## 🛠️ Service Notes

-   Check the head, threads and seating face before reuse; a screw with rounded flats, a stretched thread or heavy corrosion should be renewed, not refitted
-   Clean the threads and the mating face so the screw pulls down onto metal rather than onto dirt or old sealant
-   Use a correctly sized spanner or socket fully engaged on the head, and support the component so the screw is not loaded sideways as it tightens
-   Refit the same washers, locking devices or sealing compound that were originally used
-   Tighten to the figure and sequence given in the workshop manual for your engine, pulling the screws of a multi-screw joint down evenly in stages

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   20405724 → Supersedes 20509115

### OEM / Related Numbers

-   20460037 earlier number superseded by this part
-   20509115 earlier number superseded by this part
-   20405634 - locating spring pin
-   20405725 - V-belt pulley
-   20546792 - related vibration damper

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D7A-B TA, D7A-T, D7A-TA, D7C-B TA, D7C-TA
-   Volvo Penta D5A-B TA, D5A-T, D5A-TA
-   Volvo Penta MD2010, MD2010B
-   Volvo Penta TAD520GE, TAD520VE
-   Volvo Penta TAD530GE MECH, TAD530GE EDC4
-   Volvo Penta TAD531GE MECH, TAD531GE EDC4
-   Volvo Penta TAD720GE, TAD720VE
-   Volvo Penta TAD721GE, TAD721VE
-   Volvo Penta TAD722GE, TAD722VE
-   Volvo Penta TAD730GE MECH, TAD730GE EDC4
-   Volvo Penta TAD731GE MECH, TAD731GE EDC4
-   Volvo Penta TAD750GE, TAD750VE
-   Volvo Penta TD520GE, TD520VE
-   Volvo Penta TD720GE, TD720VE PP
-   Volvo Penta TAD420VE
-   Volvo Penta TAD532GE EDC4
-   Volvo Penta TAD550GE
-   Volvo Penta TAD551GE
-   Volvo Penta TAD620VE
-   Volvo Penta TAD650VE
-   Volvo Penta TAD660VE
-   Volvo Penta TAD732GE EDC4
-   Volvo Penta TAD733GE EDC4
-   Volvo Penta TAD734GE
-   Volvo Penta TAD751GE
-   Volvo Penta TAD760VE
-   Volvo Penta TD420VE

## Details

- **Price:** 11.96 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 11.96 AUD | In stock |

## Images

- 20405724 Six Point Screw | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20405724-six-point-screw-genuine-volvo-penta)
> Updated: 2026-10-21