1/4" x 0.734" OD Thru-Hardened Yellow Zinc Finish Steel USS General Purpose Flat Washer / CROSS-SECTIONAL SHAPE STYLE: 2 BLANK RECTANGULAR HOLE DIAMETER: 0.307 INCHES MINIMUM AND 0.327 INCHES MAXIMUM PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 0.014 INCHES MINIMUM AND 0.145 INCHES MAXIMUM OVERALL DIAMETER: 0.727 INCHES MINIMUM AND 0.749 INCHES MAXIMUM END ITEM IDENTIFICATION: 2320-01-529-2251, TRUCK, BOMB SERVICE PART NAME ASSIGNED BY CONTROLLING AGENCY: WASHER FLAT SPECIAL FEATURES: 1/4 INCH USS YELLOW ZINC PLATED THRU HARDENED WASHER; CORE HARDNESS HRC 38 TO 45 COLOR: YELLOW OVERALL MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL