Hex Head Cap Screw Assortment, Plastic Box, Container Material Plastic, Steel, Armor Coat, Flat Washers Included (50) 1/4 in, (50) 3/8 in, Hex Nuts Included Hex Nuts: (20) 1/4 In.-20, (20) 5/16 In.-18, (20) 3/8 In.-16, Lock Washers Included (20) 3/8 in, (20) 5/16 in, (30) 1/4 in