990992 Lock Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta lock nut weighing 0.363 kg and listed for 12 D-series applications. It is much the heaviest of the ten lock nuts listed in this run.

🚤 Compatibility

Typically suits:

• Volvo Penta D11C1-A MP
• Volvo Penta D11C3-A MP
• Volvo Penta D8A5-A MH
• Volvo Penta D8A6-A MH
• Volvo Penta D11B3-A MP
• Volvo Penta D11A-A
• Volvo Penta D11A-B
• Volvo Penta D11A-C
• Volvo Penta D11A-D
• Volvo Penta D11A-E
• Volvo Penta D11B1-A MP
• Volvo Penta D8A3-A MP

• Engine Family: D

⚙️ Key Features

• 0.363 kg
• 12 D-series applications
• The heaviest of the ten lock nuts listed here

🔌 Function

Holds a heavily loaded threaded joint against vibration, resisting the nut backing off once it has been pulled up.

⚠️ Common Signs of Failure

• Knock or movement from the joint it secures
• Nut found loose or backed off
• Locking action gone once the nut has been removed
• Thread stretched, galled or stripped

🛠️ Service Notes

• A nut of this size usually secures a highly loaded joint - fit a new one and tighten to the figure given for that joint rather than by feel
• Check the shaft or stud thread carefully before fitting; a stretched thread will not hold the new nut either

📦 Condition

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