Attributes . 1/8 in, 5/32 in, 4 mm, 4 1/2 mm, 3/16 in, 5 mm, 5 1/2 mm, 7/32 in, 6 mm, 1/4 in, 7 mm, 9/32 in, 5/16 in, 8 mm, 11/32 in, 9 mm, 3/8 in, 10 mm, 11 mm, 7/16 in, 12 mm, 1/2 in, 13 mm, 14 mm, 9/16 in, 15 mm, 5/8 in, 16 mm . Names