3 1 8 x 2 5 16 July 8, 2019 16 32 64 128 3 16 5 8 x 1 2 in simplest form Screw shoulder 3 8 x 2 1 2 x 5 16 18 X 5 3 16x 8 1 2 16 ×2=8 3/8-16 x 2 1/2