966650 Lock Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta lock nut weighing 0.011 kg and listed for 26 applications across the D, MD, KAD and KAMD series. The locking feature holds the nut against vibration where a plain nut would work loose.

🚤 Compatibility

• Engine Family: D, MD, KAD, KAMD
• HP Range: 55-75 HP

Full model list at the end of this description.

⚙️ Key Features

• 0.011 kg
• Listed for 26 applications
• Covers D, MD, KAD and KAMD engines
• Self-locking, needing no separate tab or wire
• Quantity varies by assembly, most commonly two

🔌 Function

Clamps its joint and resists backing off under vibration, holding the fastener's tension without a separate locking device.

⚠️ Common Signs of Failure

• Nut spinning on freely by hand, showing the locking feature is spent
• Fastener found loose or the joint rattling in service
• Thread galled or the nut binding before it reaches the joint
• Locking collar visibly distorted or split

🛠️ Service Notes

• A lock nut that runs on freely has lost its locking action and should be renewed rather than refitted
• Check the stud or bolt thread at the same time, as a picked-up thread will defeat a new nut

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D2-55, D2-55B, D2-55C, D2-75
• Volvo Penta D7A-B TA, D7A-T, D7A-TA, D7C-TA
• Volvo Penta D5A-B TA, D5A-T, D5A-TA
• Volvo Penta KAD42A, KAD42B, KAD42P-A
• Volvo Penta KAMD42A, KAMD42B, KAMD42P-A
• Volvo Penta KAMD43P, KAMD43P-A, KAMD43P-B
• Volvo Penta D12D-A MG, D12D-E MG
• Volvo Penta MD2010, MD2010B
• Volvo Penta KAD32P
• Volvo Penta KAD43P-A