by admin on 2023-03-01 11:05:43
Hexagon socket bolts are screws with a cylindrical head in the shape of a hexagon socket, which can also be called hexagon socket screws, hexagon socket cheese head screws.Commonly used hexagonal bolts are grade 4.8, grade 8.8, grade 10.9, grade 12.9 and so on. In general, according to different nee