[机]?防松螺帽

... jaw grab 多爪抓斗 jaw nut 防松螺帽 jaw of coupling head 接轴的铰接叉头 ...

?防松螺母

防松螺母 blocking nut; check nut; checknut; grip nut; jam nut; jaw nut; latch nut; lock ... 防松螺母；“锁母” locknut ..

?保险螺帽

... jaw mandrel ==> 爪式心轴 jaw nut ==> 保险螺帽 jaw of coupling head ==> 接轴铰接叉头 ...