• 子母钉/对锁螺丝螺母Sex bolt/sex nut/Binding Barrels (with screws)

  • Round coupling nut/round connector nut

  • 双头螺栓/Stud

  • 一头公一头母的延长螺柱:standsoffs

  • M5螺栓细螺纹为0.5mm,粗螺纹为0.8mm,常用为粗螺纹