Noun:

1. a screw that is used to adjust the tension on a spring

2. a screw (often without a head) that fits into the boss or hub of a wheel or cam etc. and prevents motion of the part relative to the shaft on which it is mounted

setv.放置；设定；确定；规定；调整；分配；(太阳)落下去；将（宝石）镶嵌到（某物）；配乐n.集合；组合；日落；一套；一副；一局比赛；舞台；姿态；头发的定型adj.规定的；固定的；不变的；做好准备的；固执的；不自然的Setoi濑户井(姓,日本)

ball point setscrew球端定位螺钉

captive setscrew保险螺钉