3/4" Thru-Hardened Type 1 Yellow Zinc Steel Extra Thick Structural Flat Washer Made in USA / CROSS-SECTIONAL SHAPE STYLE: 1 RECTANGULAR HOLE DIAMETER: 0.813 INCHES MINIMUM AND 0.845 INCHES MAXIMUM PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 0.305 INCHES MINIMUM AND 0.375 INCHES MAXIMUM OVERALL DIAMETER: 1.44 INCHES MINIMUM AND 1.50 INCHES MAXIMUM PART NAME ASSIGNED BY CONTROLLING AGENCY: FLAT WASHER COLOR: YELLOW OVERALL MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL