1/2" x 1.062" OD Thru-Hardened Yellow Zinc Finish Steel SAE General Purpose Flat Washer / CROSS-SECTIONAL SHAPE STYLE: 1 RECTANGULAR HOLE DIAMETER: 0.530 INCHES NOMINAL PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 0.094 INCHES NOMINAL OVERALL DIAMETER: 1.060 INCHES NOMINAL END ITEM IDENTIFICATION: NSN 2320-01-303-2277 PLS (PALLETIZED LOADING SYSTEM);HEMTT FAMILY (HEAVY EXPANDED MOBILITY TACTICAL TRUCKS); 2320-01-442-1940, TRUCK,CBT,(COMMAND BRIDGE TRANSPORTER) MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL AND CHROMATE