Wrist Pin 51 Series (1) .927 2.950 .150 139 gram

The Wrist Pin 51 Series (1) .927 2.950 .150 139 gram from JE PISTONS is a precision-engineered piston pin designed for high-performance engine builders and professional machine shops seeking OEM-quality components. Wrist pins are critical load-bearing elements that connect the piston to the connecting rod, transmitting combustion forces while allowing controlled articulation during the engine cycle. This 51-Series pin is engineered for demanding applications where reliability, dimensional consistency, and material integrity directly impact engine longevity and performance.

Manufactured in hardened steel with a 0.927-inch diameter and 2.950-inch length, this wrist pin features a 0.150-inch thick wall construction that balances strength with minimal mass. The spiral lock design secures the pin within the piston bore, preventing unwanted movement and wear while maintaining the precise clearance tolerances required for smooth reciprocating motion. JE PISTONS' 51-Series designation indicates this pin meets stringent specifications for concentricity, hardness, and surface finish—essential for minimizing friction losses and ensuring consistent piston-rod articulation across thousands of cycles. The 139-gram weight specification allows builders to optimize rotating assembly balance during engine blueprinting.

This wrist pin is ideal for engine rebuilds, high-revving race engines, and applications requiring JE piston assemblies with matching pin specifications. Compatibility depends on your specific piston model and connecting rod bore diameter; verify fitment against your complete piston assembly documentation before installation. Professional installation is recommended to ensure proper spiral lock seating and bore alignment, critical for preventing pin rocking and premature wear. Sold individually, allowing builders to source replacement or additional pins for multi-cylinder builds.