Split lock washers Hole Diameter: Between 0.509 inches and 0.523 inches Outside Diameter: 0.873 inches Material Thickness: Between 0.125 inches and 0.135 inches Material: Steel comp 1060 or steel comp 1561 or steel comp 1064 or steel comp 1065 or steel comp 1566 or steel comp 1069 or steel comp 1070 or steel comp 1572 or steel comp 1075 or steel comp 1078 or steel comp 1080 Surface Treatment: Cadmium Style Designator: Split helical-right hand 8700 pcs.