Split Lock Washer, Bolt 5/16, CS, PK100/ HOLE DIAMETER: 0.322 INCHES NOMINAL OUTSIDE DIAMETER: 0.583 INCHES NOMINAL MATERIAL THICKNESS: 0.078 INCHES NOMINAL END ITEM IDENTIFICATION: 6150-01-633-6567;LOAD BANK,ELECTRICAL PART NAME ASSIGNED BY CONTROLLING AGENCY: WASHER,LOCK SPECIAL FEATURES: ROCKWELL HARDNESS C38 TO C46;MEETS/EXCEEDS ASME B18.21.1;FITS BOLT SIZES 0.3125 MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL STYLE DESIGNATOR: 108 SPLIT HELICAL-RIGHT HAND