HOLO-KROME 43026 براغي مقبس نقطة الكوب المخددة مقاس 5/16-24 × 5/16 بوصة | فولاذ سبائكي بأكسيد أسود حراري (100/عبوة)

The knurled cup point on these set screws really bites into the shaft without slipping. I used them to secure a small gear, and they haven't loosened up after a few hours of run time. Easy to drive the hex socket, even in a tight spot.

I needed these for a jig I was building, and the knurled cup point really bites into the shaft without slipping, even under heavy torque. They hold fast in a tapped hole perfectly.

The hex socket drive on these screws fits my driver perfectly, no wobble or stripping issues. I used them to secure a small pulley on a shaft, and the knurled cup point held it firmly in place. Great for precision clamping work.