Locking Retaining Ring 0.01 in Thk PK5 System of Measurement Inch Location Style External Thickness 0.01 in Fits Shaft Diameter 5/16 in For Bore Diameter Not Applicable Fits Groove Width - Fits Groove Depth - Free Inside Diameter 0.31 in Free Outside Diameter 0.584 in Material Stainless Steel Finish Plain Material Grade/Class 18-8 Ring Type Self-Locking Retaining Ring Manufacturer Location Made in USA Thickness Tolerance +/-0.001 in Standards REACH Compliant RoHS Compliant