HOLO-KROME 32288 1-8 × 1-1/2" براغي تثبيت بنقطة كوبية بمقبس سداسي | فولاذ سبائكي مؤكسد أسود حراريًا (10 / عبوة)

The hex socket drive bit snugly, and the black oxide finish looks clean against the shaft. These cup points held firm when I clamped a pulley down, though the 1-8 thread is coarse enough that you’ll want a proper torque wrench.

Just installed a few of these as set screws on a pulley assembly, and the hex socket drive made tightening them down in a tight spot much easier. The black oxide finish gave them a nice, uniform look against the shaft too.

These cup point screws bit into the shaft firmly when I tightened them down, and the black oxide finish looks clean. Exactly what I needed for a small clamping fixture.