noun
locking screw; set screw
A screw used to secure a part in place, often by pressing against another component. Technical term in mechanical engineering.
この部品は押さえねじで固定されています。
This part is secured with a locking screw.
押さえねじを締めて、軸が動かないようにしてください。
Tighten the set screw so that the shaft does not move.