Bolt: Mechanical fastener, usually used with a nut, for connecting two or more parts.
螺栓：通常与螺母一起用于连接两个或更多零件的机械紧固件。
2
The utility model relates to a tool-type fastener, in particular to a tool-type fastenerbolt replacement tool.
本实用新型涉及工具式扣件，尤其涉及工具式扣件螺栓更换工具。
3
The value of tightening torque is relative not only to the nominal diameter and quality class of the bolt, but also to the security of the threaded fastener.