5/8" x 1.750" OD Low Carbon Zinc Finish Steel USS General Purpose Flat Washer / CROSS-SECTIONAL SHAPE STYLE: 1 RECTANGULAR HOLE DIAMETER: 0.681 INCHES MINIMUM AND 0.718 INCHES MAXIMUM PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 0.108 INCHES MINIMUM AND 0.160 INCHES MAXIMUM OVERALL DIAMETER: 1.743 INCHES MINIMUM AND 1.780 INCHES MAXIMUM END ITEM IDENTIFICATION: MRAP-COUGAR PART NAME ASSIGNED BY CONTROLLING AGENCY: 5/8" FLAT WASHER MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL