Split Lock Washer, Finish Black Oxide, Material Steel, For Screw Size 1 5/8 in, Inside Diameter 1.633 in, Outside Diameter 2.487 in, Maximum Thickness 0.344 in, Minimum Thickness 0.344 in, Color Black, Dimensional Standards ASME B18.21.1, Material Grade/Class Not Graded, Pack Size Small Pack, Rockwell Hardness C38, System of Measurement Inch, Thickness Tolerance -, Package Quantity 175