Metal plugs ending in a head and threaded so they can be tightly screwed into nuts to secure fastenings and assemblies. 金属塞，端部在头部，螺纹连接，以便能紧紧拧入螺母，以固定紧固件和组件。
2
shoulder bolt
台阶螺栓,带肩螺栓
Bolt whose head comprises a section of smaller diameter for concentrating the tightening pressure. 螺栓，其头部包括一段较小直径的螺栓，用于集中拧紧压力。
3
threaded rod
螺杆
Elongated part whose surface has a spiral protrusion for screwing into a corresponding nut. 表面有螺旋状突起以拧入相应螺母的细长零件。
1
bolts
短圆材
Metal plugs ending in a head and threaded so they can be tightly screwed into nuts to secure fastenings and assemblies. 金属塞，端部在头部，螺纹连接，以便能紧紧拧入螺母，以固定紧固件和组件。
2
shoulder bolt
台阶螺栓,带肩螺栓
Bolt whose head comprises a section of smaller diameter for concentrating the tightening pressure. 螺栓，其头部包括一段较小直径的螺栓，用于集中拧紧压力。
3
threaded rod
螺杆
Elongated part whose surface has a spiral protrusion for screwing into a corresponding nut. 表面有螺旋状突起以拧入相应螺母的细长零件。
