set screw        
[das] 压螺栓。固螺栓。顶起螺丝。顶举螺旋。螺旋千斤顶。
jacking screw, jacking bolt, jackscrew, lifting screw, set screw, hexagon set screw with full dog point

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[die] pl.Feststellschrauben 位螺。位螺体，固螺栓
set screw, clamping bolt, clamping screw