Hex Flange Bolt Assortment Standard Steel Plain Finish 5/16-18 1/4-20 Length 3/4 to 3 In Hex Drive Type Number of Pieces 203 Number of Sizes 20 Includes Nuts (20) 1/4-20 (15) 5/16-18 Bolts 16 of Each 1/4-20x3/4 x1 x1 1/4 12 of Each 1/4-20x1 1/2 5/16-18x3/4 x1 x1 1/4 x1 1/2 6 of Each 1/4-20x1 3/4 x 2 x 2 1/4 x 2 1/2 x 3 5/16-18x1 3/4 x2 x2 1/4 x2 1/2 x3 In