HOLO-KROME 33084 مسامير تثبيت بمقبس سداسي بنقطة كوب 1/4-28 × 3/4 بوصة | فولاذ سبائكي مؤكسد أسود حراريًا (100 / عبوة)

The hex drive seats perfectly without camming out, and the black oxide finish feels durable. These screws held my shaft collar securely on the first try. Exactly the snug fit I needed for a precision assembly.

The cup point grips nicely in the tapped hole I used for a jig fixture, and the black oxide finish seems durable enough for repeated adjustments. I appreciate that the hex drive doesn't strip easily under moderate torque.

The cup point bites in nicely and doesn't slip once tightened. I used these to secure a sprocket on a small shaft and they haven't loosened at all after a few hours of runtime.