小老头and小胖子
法兰面螺栓 bolt for flange face钢结构螺栓 bolt for steel structure扭剪螺栓 torque bolt双头螺栓 stud bolt组合螺钉 assembled bolt电子螺丝 electronic screw紧定螺丝 tightening screw塞打螺丝 stuff screw自攻钉 self-tapping screw自锁螺钉 self-locking bolt焊钉 welded pin墙板钉wallboard nail 拉铆钉rivet 全牙丝杆 full-thread rod化学膨胀螺栓 chemical expansion bolt铆螺母 rivet nut金属自锁螺母 metal self-lock nut法兰螺母flange nut 槽螺母 slotted nut盖形螺母 cap nut平垫 plain（flat） washer弹簧垫圈spring washer 1、白锌 white zinc2、灰磷 grey phosphorus 3、黑磷 black phosphorus4、镀铬chromeplate 5、电泳黑electrophoresis black 6、机械镀锌mechanical zinking 7、热浸镀锌hot dip galvanizing
