براغي سوكيت ذات نقطة كوب محززة HOLO-KROME 42032 1/4-20 X 3/8" | فولاذ سبائكي أكسيد أسود حراري (100/عبوة)

The knurled cup point design really held my shaft firmly in place during assembly, no slipping at all. The black oxide finish looks clean and professional, and I appreciate the hex socket drive for easy torque control.

The uniform heat treatment is obvious from the moment you handle them; the black oxide finish is even and won't flake off during installation. I used a full pack on a couple of drive shafts and didn't have a single stripped hex socket. Exactly what I expect from this type of fastener.

The knurled cup point really grabs and holds firm in tapped holes, making assembly a breeze. These 1/4-20 x 3/8" screws are perfect for clamping components on shafts, and the black oxide finish seems durable.