1/4" x 0.625" OD Low Carbon Yellow Zinc Finish Steel SAE General Purpose Flat Washer / CROSS-SECTIONAL SHAPE STYLE: 1 RECTANGULAR HOLE DIAMETER: 0.276 INCHES MINIMUM AND 0.296 INCHES MAXIMUM PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 0.051 INCHES MINIMUM AND 0.080 INCHES MAXIMUM OVERALL DIAMETER: 0.620 INCHES MINIMUM AND 0.640 INCHES MAXIMUM END ITEM IDENTIFICATION: MRAP BUFFALO MK2A2; MRAP - M-ATV PART NAME ASSIGNED BY CONTROLLING AGENCY: 1/4 SAE FLAT WASHER SPECIAL FEATURES: MATERIAL CARBON STEEL COLOR: YELLOW OVERALL MATERIAL: STEEL OVERALL PROPRIETARY CHARACTERISTICS: NPAC SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633, SC1. TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL