Lock Washer Lock Washer Type Wedge Lock Finish Delta Protect Material Steel For Screw Size 1 1/8 in Inside Diameter 1.14 in Outside Diameter 1.715 in Maximum Thickness 0.256 in Assembly Thickness 0.256 in Color Silver Material Grade/Class Case Hardened Pack Size Small Pack Resistance Properties Shock Resistant Vibration Resistant Rockwell Hardness HRC40 System of Measurement Inch Package Quantity 25