供应各种规格的英制圆头内六角螺丝(英制圆杯螺丝),常用规格有:3/16-24x1/43/16-24x15/163/16-24x1x3/83/16-24x1x1/23/16-24x1x5/83/16-24x1x3/43/16-24x1x13/16-24x1x1-1/43/16-24x1x1-1/21/4-20x3/81/4-20x1/21/4-20x5/81/4-20x3/41/4-20x11/4-20x1-1/41/4-20x1-1/21/4-20x1-3/41/4-20x25/16-18x1/25/16-18x5/85/16-18x3/45/16-18x15/16-18x1-1/45/16-18x1-1/25/16-18x1-3/45/16-18x25/16-18x25/16-18x2-1/25/16-18x33/8-16x5/83/8-16x3/43/8-16x13/8-16x1-1/43/8-16x1-3/43/8-16x23/8-16x2-1/21/2-12x3/41/2-12x11/2-12x1-1/41/2-12x1-1/21/2-12x1-3/41/2-12x21/2-12x2-1/21/2-12x31/2-12x3-1/21/2-12x4)