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: 0.531 INCHES NOMINAL PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 0.095 INCHES NOMINAL OVERALL DIAMETER: 1.062 INCHES NOMINAL END ITEM IDENTIFICATION: 2355015393639 SPECIAL FEATURES: NOMINAL SIZE 0.500 INCHES MATERIAL: STEEL OVERALL SURFACE TREATMENT: CHROMATE ZINC OVERALL NONDEFINITIVE SPEC/STD DATA: THRU-HARD STYLE AND FLAT TYPE AND 0.397 POUNDS WEIGHT