M16 x 60mm 杯端內六角止付螺絲 | 合金鋼 (25顆/包)

The hex socket drive made tightening these set screws incredibly easy even in a cramped space on my machinery. The cup point tip really bites into the shaft well, so I trust the hold. Decent value for a pack of 25 heavy-duty screws.

Used one to lock a collar onto a heavy-duty shaft, and the hex socket gripped perfectly under high torque without stripping. The cup point bit in firmly with no slipping, even after a full day of vibration. Solid steel, solid purchase for the price.

Installing these was a breeze - the cup point tip seated perfectly and didn't slip once during tightening. The hex drive handled my impact wrench without stripping.