HOLO-KROME 32180 براغي آلية ذات نقطة كوب مقاس 3/8-16 × 1 بوصة | فولاذ سبائكي بأكسيد أسود حراري (100 / عبوة)

The hex socket drive seated perfectly on my Allen key, and the cup point bit into the shaft exactly where I needed it to lock a gear in place. For a hundred pack at this price, these are solid little workhorses that I'll be using for a long time.

Had a small vibration issue in a pulley assembly that these set screws fixed immediately. The black oxide finish gives them a nice grip right out of the package, and the hex drive seated perfectly with no stripping during installation.

The cup point grips the shaft way better than the flat-tip screws I used before, so my pulley hasn't budged since I torqued it down. The thermal black oxide finish also kept them from rusting after a few damp days in the workshop.