Imperial A2 Stainless Steel Spring Lock Washers - 3/16" To 5/8" BSF UNC UNF
A2 Stainless Steel - For increased corrosion Resistance. Imperial Spring Washers. 3/16" To 5/8" sizes available to fit all imperial bolts & screws. Sizes given are for the size bolt it will fit. 3/16" 3/8" 3/64".