GB30各種規格的不銹鋼.鐵.銅材質的外六角螺栓國標，英制外六角可以根據客戶的要求定做非標外六角螺栓常用規格有:4x84x104x125x85x105x125x165x205x255x305x355x405x455x506x126x166x206x256x306x356x406x456x506x556x606x706x806x906x1008x148x168x208x258x308x358x408x458x508x558x608x658x708x808x908x10010x2010x2510x3010x3510x4010x4510x5010x5510x6010x6510x7010x8010x9010x100另外還有M12 M14M16M18M20M22M24M27M30外六角螺絲