1 4 28 x 1 2 screw July 8, 2019 16 32 64 128 Nylon tipped tension set screw 1 4 28 x 1 2 1 4 28 x 1 2 set screw 1 4 28 x 1 2 machine screw 1 4 28 x 3 1 2 machine screw shaft diameter 1 4 28 x 3 1 2 machine screw 1/4 + 3/8