HOLO-KROME 32112 براغي تثبيت ذات رأس كوبي 1/4-20 × 3/16 بوصة | فولاذ سبائكي مؤكسد أسود حراريًا (100 / عبوة)

The cup point bites into the shaft really well for a secure hold, and the black oxide finish looks clean. I've used a few of these on a repair and they haven't loosened at all under moderate vibration.

Needed these for a jig I was building, and the black oxide finish looks great while keeping things rust-free. The hex socket engagement felt precise, no wobble when driving them in.

These cup point screws held my shaft collar firmly in place with no slipping, and the hex socket made installation quick with a standard allen key. Exactly the right fit for my machine alignment project.