1/4" x 0.625" OD Low Carbon Zinc Finish Steel SAE General Purpose Flat Washer / HOLE DIAMETER: 0.281 INCHES NOMINAL PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 0.062 INCHES NOMINAL OVERALL DIAMETER: 0.625 INCHES NOMINAL PART NAME ASSIGNED BY CONTROLLING AGENCY: GENERAL PURPOSE FLAT WASHER SPECIAL FEATURES: GRADE- LOW CARBON, STYLE- SAE, WEIGHT- 0.45, BOLT SIZE- 0.25 INCH MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL