HOLO-KROME 33082 براغي مقبس سداسي بنقطة كوب 1/4-28 × 5/8 بوصة | فولاذ سبائكي أكسيد أسود حراري (100 / عبوة)

The cup point really locks down on the shaft without any slipping, and the black oxide finish makes them look clean even after a few uses. Got exactly 100 in the package, which was perfect for the job I had.

The hex socket drive made tightening these into a tight spot on my mill much easier than slotted grub screws. The black oxide finish also held up well against the light oil I used during installation.

Installed a full package of these on a shaft assembly and every single one seated flush with clean threads. The cup point bites down hard without slipping, and the black oxide finish handles a bit of wrenching without wearing off.