DISCONTINUED - 5/8" x 1.303" OD Thru-Hardened ECOGUARD® Finish Steel SAE General Purpose Flat Washer for Grade 9 Applications / CROSS-SECTIONAL SHAPE STYLE: 1 RECTANGULAR HOLE DIAMETER: 0.641 INCHES NOMINAL PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 0.160 INCHES NOMINAL OVERALL DIAMETER: 1.303 INCHES NOMINAL PART NAME ASSIGNED BY CONTROLLING AGENCY: GRADE 9 SAE FLAT WASHER MATERIAL: STEEL OVERALL