HOLO-KROME 33108 براغي رأس مقبس بنقطة كوب 3/8-24 × 1/2 بوصة | فولاذ سبائكي مع أكسيد أسود حراري (100/عبوة)

I needed a cup point screw for a tight shaft assembly, and these seated perfectly without any wobble. The thermal black oxide finish looks clean and seems durable so far.

The hex socket drive bites well, and the cup point digs into the shaft just enough to hold a collar in place without marring the surface too badly. All 100 pieces came with clean threads, though a drop of oil on each helps them seat easier in tapped holes.

Installed these on a shaft collar and the cup point bit in firmly without stripping the hex drive. The black oxide finish on the alloy steel feels solid and resists rust in my shop.