0.945in x 1.6mm Round Wire Lock

The 0.945in x 1.6mm round wire lock from MAHLE PISTONS is a precision wrist pin lock engineered for high-performance engine builds and stock piston assemblies alike. This component secures the wrist pin (gudgeon pin) to the connecting rod, preventing axial movement during combustion cycles and load reversals. Whether you're rebuilding a street engine, refreshing a vintage vehicle, or assembling a competition powerplant, this wire lock is essential for piston security and long-term engine reliability.

Manufactured from hardened steel, the 0.945in x 1.6mm round wire lock delivers consistent snap-fit retention without requiring permanent deformation or locking compounds. The 1.6mm wire diameter provides optimal spring tension and radial pressure, holding the wrist pin firmly in the connecting rod bore while allowing controlled removal during future disassembly. MAHLE's manufacturing tolerances ensure that each lock fits precisely within the pin bore groove, eliminating play and maintaining correct piston-to-rod alignment throughout engine operation. The round wire profile distributes stress evenly across the groove, reducing wear and extending component life in both naturally aspirated and forced-induction applications.

This wire lock is compatible with any engine featuring a 0.945-inch wrist pin diameter, including common small-block and mid-block platforms across domestic and import vehicles. Mechanics and engine builders favor MAHLE pistons and retention hardware for their OEM-equivalent quality and proven durability in both stock and modified engines. Installation requires careful seating of the wire lock into the connecting rod groove—proper fit prevents piston rocking and noise while safeguarding against catastrophic pin failure. For rebuild kits, competition engines, or single-piston replacement, sourcing the correct wire lock specification ensures long-term performance and worry-free operation under sustained power delivery.