10.9级细牙外六角螺丝螺栓螺杆M10M12M14M16M18M20M24*1.25x1.5x2
GB91国标镀锌开口销销子2/3/4/5/6/8/10/12mm*80x100x120x130x150
钻尾丝螺丝套筒强磁加长8mm9mm11mm六角彩钢瓦自攻螺丝钉套头批头