990980 Lock Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta lock nut weighing 0.009 kg and listed for 34 applications across the D, TWD, TID and TAD ranges. It supersedes part number 971089.

🚤 Compatibility

• Engine Family: D, TWD, TID, TAD

Full model list at the end of this description.

⚙️ Key Features

• 0.009 kg
• 34 applications across four ranges
• Supersedes 971089
• Quantity varies by assembly, most commonly 12
• Also supersedes Volvo part numbers 10593, 10783 and 3552649

🔌 Function

Holds a threaded joint against vibration, the locking feature resisting the nut working back.

⚠️ Common Signs of Failure

• Fastener found loose in service
• Nut spinning freely on the thread
• Thread galled or stripped
• Corrosion locking the nut to the stud

🛠️ Service Notes

• Renew rather than reuse - the locking feature only works properly on the first fit

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 990980 → Supersedes 971089 → Supersedes 876020

OEM / Related Numbers

• 971089 earlier number superseded by this part
• 963107 earlier number superseded by this part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 D9A2J, D9A2G, D9A2L MH, D9A2D, D9A2B, D9A2F, D9A2K, D9A2H, D9A2M MP, D9A2A, D9A2C, D9A2E
• Volvo Penta D11C1-A MP, D11C3-A MP, D11B3-A MP, D11A-A, D11A-B, D11A-C, D11A-E, D11A-D MP, D11B1-A MP
• Volvo Penta D8A5-A MH, D8A6-A MH, D8A1-A MP, D8A2-A MP, D8A3-A MP
• Volvo Penta TID162AG, TID162AGP, TID162APB
• Volvo Penta TWD1630P, TWD1630PP, TWD1630V
• Volvo Penta TAD1630P, TAD1630PB