M5 x 10mm OD DIN 125 Grade HV300 Zinc Finish Steel Type A General Purpose Flat Washer / CROSS-SECTIONAL SHAPE STYLE: 1 RECTANGULAR HOLE DIAMETER: 5.3 MILLIMETERS NOMINAL PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 1.00 MILLIMETERS NOMINAL OVERALL DIAMETER: 10.0 MILLIMETERS NOMINAL END ITEM IDENTIFICATION: MRAP BUFFALO MK2A2 PART NAME ASSIGNED BY CONTROLLING AGENCY: M5 STEEL ZINC 300HV FLAT WASHER MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL