5/8" x 1.500" OD C-110 Copper Small OD Flat Washer / CROSS-SECTIONAL SHAPE STYLE: 1 RECTANGULAR HOLE DIAMETER: 0.687 INCHES NOMINAL PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 0.102 INCHES NOMINAL OVERALL DIAMETER: 1.750 INCHES NOMINAL END ITEM IDENTIFICATION: 4940-01-591-0265 MATERIAL: COPPER OVERALL