These high quality Pins are ISO 9000 and QS 9000 certified and statistical process control (SPC) is fully implemented throughout manufacturing. 100 Rockwell tested Case hardened (computerized gas process) Gun drilled I.D.s with 3 stages of I.D. honing Weight tolerances +/- 1 gram Precision ground ends with I.D. radius Straight wall design to reduce pin galling on ends Available with chamfered ends for Wire Locks Cryogenically treated (subzero heat-treating process) for improved material strength and grain structure Upgraded Wrist Pins Length 2250mm Material 9310 Steel Type Chromoly (Wire) Wall Thickness 200mm Wrist Pin Dia 866mm Images used may be generic. Actual product may vary.