Pack of 350 Stainless Steel Flat and Lock Washers in Assorted Sizes, 6 Common Sizes 175 Flat washers and 175 Lock washers Corrosion resistant stainless steel construction 6 Common sizes Lock washers: #6 (50 pcs), #8 (40 pcs), #10 (30 pcs), 1/4" (25 pcs), 5/16" (15 pcs), 3/8" (15 pcs) Flat washers: #6 (50 pcs), #8 (40 pcs), #10 (30 pcs), 1/4" (25 pcs), 5/16" (15 pcs), 3/8" (15 pcs)