# 21906721 Flange Screw | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Drive Bearing-Carrier Flange Screw - Part Number: 21906721

  

High-strength flange screw used in a Volvo Penta drive bearing-carrier assembly. The integrated flange distributes clamp load and the exact thread, length and material are selected for submerged drive service.

  

⚙️ Key Features

  

• Specified thread, length and strength class

• Integrated flange distributes clamp load

• Corrosion-resistant drive-service finish

• Designed for the assigned torque

• Exact drive serial fitment required

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21906721 (current listed OEM reference)

  

OEM / Related Numbers:

  

• 21906721

• 3860842 - related service kit

• 3852304 - sleeve

• 3860364 - screw

• 3852565 - O-ring

• 914538 - snap ring

• 3852272 - seal

• 3850853 / 183247 / 3848077 - bearing references

• 21702087 - bearing carrier

• 990859 / 3888122 - alternate flange-screw references used in other serial configurations

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta sterndrive bearing-carrier / gearcase assembly listing screw 21906721

  

Typically suits:

  

• Engine / drive models:

  

• Exact Volvo Penta product / serial configuration listing 21906721

  

• HP / Rating: Engine or drive rating controlled by the complete product number

  

• Engine / System Type: Marine sterndrive gearcase

  

• Year Range: Production configuration controlled; verify by product and serial number

  

• Serial / Specification Control: Confirm drive model, serial number, screw length and thread. Alternate screw numbers are configuration specific and are not automatic substitutes.

  

🔌 Function

  

Clamps the bearing carrier or related drive component to the housing at the specified preload.

  

Common signs of failure or wear:

  

• Corroded or seized threads

• Rounded drive head

• Loss of clamp load

• Thread damage in the housing

• Fastener stretch or fracture from incorrect torque

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 3.16 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3.16 AUD | In stock |

## Images

- 21906721 Flange Screw | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21906721-flange-screw-genuine-volvo-penta)
> Updated: 2026-08-02