Split Lock Washer, Finish Black Oxide, Material Steel, For Screw Size 1 3/4 in, Inside Diameter 1.758 in, Outside Diameter 2.613 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 +0.030 in, Package Quantity 10