20709931 Screw | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta service screw used in a mounting or adjustment assembly. Published records confirm the component identity but do not disclose one universal engine position; the complete serial-specific parts list for your engine must therefore be used.

⚙️ Key Features

• Exact OEM thread and shoulder geometry for the assigned position
• Works with the associated 20709930-20709933 hardware group where that parts list for your engine is specified
• Maintains the required clamping, spacing or alignment
• Material and finish suit engine vibration and corrosion exposure
• Use the Volvo Penta tightening or assembly procedure
• Do not substitute visually similar hardware without dimensional verification

🔌 Function

Provides the specified clamping or locating force in the serial-controlled hardware assembly.

⚠️ Common Signs of Failure

• Threads are stripped or stretched
• The drive head is rounded
• The joint repeatedly loosens
• The screw is bent or corroded
• Replacement is required where secure reuse cannot be confirmed

🛠️ Service Notes

• Clean the threads in the casting and check them for damage before fitting; a screw run into a dirty or pulled thread gives a false torque reading and will not hold its load
• Tighten to the torque given in the workshop manual for your engine rather than by feel, and follow the specified sequence where the joint has one
• Use the thread locking or sealing compound the manual calls for at that joint — some screws pass into oil, coolant or fuel space and have to seal as well as clamp
• Renew any screw that is stretched, corroded in the shank, or has damaged threads or a rounded head, and never reuse one that was tightened by a stretch or angle-tighten procedure
• A little marine-grade anti-seize helps later removal where the manual permits it, but keep it off threads that are meant to take a locking compound

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20709930 - Washer in the associated hardware group
• 20709932 - Spacer in the associated hardware group
• 20709933 - Nut in the associated hardware group

📦 Condition

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