Retaining Ring Internal 0.01 in Thk PK50 System of Measurement Inch Location Style Internal Thickness 0.01 in Fits Shaft Diameter Not Applicable For Bore Diameter 1/2 in Free Inside Diameter 0.258 in Free Outside Diameter 0.502 in Material Steel Finish Plain Material Grade/Class Ungraded Ring Type Self-Locking Retaining Ring Pack Size Small Pack Manufacturer Location Globally Sourced Ring Sub-Type Tooth-Locking Package Quantity 50