Split Lock Washer, Lock Washer Type Split Lock, Finish Armor Coat, Material Steel, For Screw Size 1/2 in, Inside Diameter 0.512 in, Outside Diameter 0.879 in, Maximum Thickness 0.125 in, Minimum Thickness 0.125 in, Color Silver, Dimensional Standards ASME B18.21.1, Material Grade/Class Not Graded, Pack Size Small Pack, Rockwell Hardness C33, System of Measurement Inch, Thickness Tolerance +/-0.006 in, Package Quantity 25