HOLO-KROME 32154 براغي تثبيت بنقطة كوب 5/16-18 × 1 بوصة | فولاذ سبائكي معالجة حرارياً أسود (100/عبوة)

I needed a set screw that wouldn't back out on a motor shaft, and these cup points bit in nicely without any wobble. The hex socket drive made installation straightforward with a standard Allen key.

The black oxide finish on these cup point screws held up perfectly under my socket driver, no stripping or slipping. I used them to secure a clamping bracket on a small shaft assembly, and the hex socket engagement felt precise and solid. Exactly what I needed for that application.

Finally found set screws that don't cam out under torque—the hex socket drive holds the wrench securely. The black oxide finish gives them a nice, clean look on my shaft assembly. Exactly the cup point profile I needed for a solid clamp.