六角形螺母 628 series

钢

4 mm, 5 mm, 6 mm, 8 mm, 10 mm
(0.16 in, 0.2 in, 0.24 in, 0.31 in, 0.39 in)

11 mm, 14 mm, 16 mm, 18 mm, 23 mm
(0.433 in, 0.551 in, 0.63 in, 0.709 in, 0.906 in)