3812221 Wing Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta wing nut from the Lubricating and Oil System group, weighing 0.032 kg and listed for 26 applications on D series engines. It supersedes part number 3838925, catalogued earlier as a retainer.

🚤 Compatibility

• Engine Family: D

Full model list at the end of this description.

⚙️ Key Features

• 0.032 kg
• 26 applications on D series engines
• Supersedes 3838925, previously listed as a retainer
• Hand-tightened fastener

🔌 Function

Clamps a cover or filter bowl down by hand, so the joint can be opened for servicing without tools.

⚠️ Common Signs of Failure

• Cover or bowl weeping because the nut will not pull down
• Wings bent, cracked or snapped off
• Thread stripped or crossed
• Nut seized on the stud by corrosion

🛠️ Service Notes

• The superseded number was listed as a retainer, so expect a differently named item in older records
• Hand-tight is the intent, and levering on the wings breaks them
• Check the stud and the cover seal at the same time

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3812221 → Supersedes 3838925

OEM / Related Numbers

• 3838925 earlier number superseded by this part

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D11C1-A MP, D11C3-A MP, D11C2-A MP, D11C4-A MP, D11B3-A MP, D11B4-A MP, D11A-C, D11A-E, D11B2-A MP, D11A-C MP, D11A-D MP, D11A-E MP, D11A-C (IPS), D11B1-A MP
• Volvo Penta D9A2J, D9A2G, D9A2L MH, D9A2D, D9A2B, D9A2F, D9A2K, D9A2H, D9A2M MP, D9A2A, D9A2C, D9A2E