Spiral Retaining Ring 0.035 in Thk PK10 System of Measurement Inch Location Style Internal Thickness 0.035 in Fits Shaft Diameter Not Applicable For Bore Diameter 1/2 in Fits Groove Diameter 0.53 in Fits Groove Width 0.039 in Fits Groove Depth 0.015 in Free Outside Diameter 0.538 in Material Stainless Steel Finish Plain Material Grade/Class 18-8 Tensile Strength 200 000 psi Ring Type Spiral Retaining Ring Material Quality Standards ANSI Manufacturer Location Made in USA