圆柱焊接螺母内螺丝套管圆柱型加长螺母柱铁连接M6M8M10M12M14M16
堵油内六角法兰面堵头油塞细牙螺丝M8M10M12M14M18M20*1*1.25*1.5
镀锌平垫垫圈圆形平垫穿螺丝铁平垫片薄M3M4M5M6M8M10M12 -M72