براغي سوكيت ذات نقطة كوب من هولو-كروم 32224 1/2-13 × 1-1/4 بوصة | فولاذ سبائكي مع أكسيد أسود حراري (50 / عبوة)

I needed a set screw that wouldn't round out under heavy torque, and the hex socket drive on these holds the Allen key perfectly without stripping. The thermal black oxide finish also resists rust nicely in my damp shop environment.

These cup point screws bite into the shaft firmly when you cinch them down, and the thermal black oxide finish keeps them looking clean. I've used a few so far on a gear coupling and the hex socket drive hasn't stripped once.

I needed a dozen for a shaft collar repair and these threaded in cleanly with no binding. The hex socket drive made it easy to get them snug without stripping.