Attributes . Barrel Bolts: (30) 1/4x1/4 in, (30) 1/4x3/8 in, (30) 13/64x1/2 in, (20) 1/4x1/2 in, (20) 1/4x3/4 in, (20) 1/4x1 in, (20) 5/16x3/8 in, (20) 13/64x3/4 in, (10) 1/4x1 1/2 in, (10) 5/16x1/2 in, (10) 3/8x1/2 in . Names