21308415 Screw | Genuine Volvo Penta Part

🔧 Product Description

A factory-specified screw used in the Volvo Penta engine or drive assembly catalogued for part number 21308415. It supersedes earlier fastener references 851434 and 102045.

⚙️ Key Features

• Supersedes two earlier fastener references
• Correct factory thread, length and strength grade
• Suitable for direct replacement by exact part number
• Engine type: Volvo Penta marine or industrial engine or drive

🔌 Function

Secures the designated component at the specified clamping load.

⚠️ Common Signs of Failure

• Damaged or stripped thread
• Corroded screw head
• Fastener will not retain torque
• Incorrect replacement length
• Screw breaks during removal or tightening

🛠️ 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 Supersession Chain

• 21308415 → Supersedes 3809480

OEM / Related Numbers

• 3809480 earlier number superseded by this part
• 851434 - earlier screw
• 102045 - earlier screw reference

📦 Condition

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