Lock Washer Lock Washer Type Wedge Lock Finish Plain Material Stainless Steel For Screw Size 9/16 in Inside Diameter 0.572 in Outside Diameter 10.128 in Maximum Thickness 0.127 in Assembly Thickness 0.127 in Color Silver Material Grade/Class Not Graded Pack Size Small Pack Resistance Properties Shock Resistant Vibration Resistant Rockwell Hardness HRC25 System of Measurement Inch Package Quantity 100