Flat Washer: 18-8, Stainless Steel, 5/8 in Screw Sz, 0.656 in In Dia, 1 3/8 in Out Dia, 18-8, 5 PK

General purpose metal flat washers provide a smooth surface under the head of a nut or bolt to prevent loosening and damage to the work surface. These round washers also minimize heat and friction while installing a threaded fastener.