5/8 Square Washer 0.688 ID 2.000 OD 0.112-0.128 Thk Steel USA - AMPG - Shoulder Screws, Shoulder Bolts, Sex Bolts, Flat Washers, Machine Screws and other fasteners
Amazon.ca: Square Washers: Tools & Home Improvement
WASHER, SQ FLAT, 5/8in SIZE, 2 1/4in | 6813 | Hubbell Power Systems
7/16 inch Zinc Plated Steel 1 - 5/8 inch Cooper B-Line Square Washer (B201ZN) at Main Electric Supply
B200DGRN | Eaton B-Line series square washer | Eaton
5/8" Square Washer MSI J1074 - At Georgia Underground!