Split Lock Washer, Lock Washer Type Split Lock, Finish Plain, Material Spring Steel, For Screw Size 1 in, Inside Diameter 1.024 in, Outside Diameter 1.656 in, Maximum Thickness 0.25 in, Minimum Thickness 0.25 in, Dimensional Standards ASME B18.21.1, Material Grade/Class Grade 2, Pack Size Small Pack, Rockwell Hardness C38, System of Measurement Inch, Thickness Tolerance 0.250 in to 0.297 in, Package Quantity 50