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1/4'', 5/16'' and 3/8'' UNC Nut and Washer Master Assortment Set - 490 Pieces.
Content: 50 x 1/4 UNC Plain Nuts, 25 x 1/4 UNC Nyloc Nuts, 100 x 1/4 Plain Washers, 50 x 5/16 UNC Plain Nuts, 25 x 5/16 UNC Nyloc Nuts, 100 x 5/16 UNC Plain Washers, 40 x 3/8 UNC Plain Nuts, 20 x 3/8 UNC Nyloc Nuts, 80 x 3/8 Plain Washers.