براغي ذات رأس أسطواني 1/2-13 × 5/8 بوصة | محرك سداسي | كرة نايلون | ملولبة بالكامل | فولاذ سبائكي مع أكسيد أسود حراري (50 / عبوة)

The black oxide finish on these screws really grips the hex key nicely—no slipping when torquing down. I used a full pack to rebuild a fixture on my mill, and every one threaded smoothly. Exactly what I needed for heavy-duty jig work.

Used a handful to secure a jig baseplate, and the hex socket drive made installation smooth even in tight spots. The nylon pellet locking feature gives me real peace of mind for high-vibration machinery.

The black oxide finish on these is flawless, and the nylon pellet keeps them locked in place even under vibration on my jig setup. Threads cut clean all the way through, no burrs or tight spots. For fifty pieces at this price, they’re a solid deal for any shop.