براغي رأس مقبس 5/16-18 × 2-1/2 بوصة | محرك مقبس سداسي | حبة نايلون | جزئية الخيوط | فولاذ سبيكة أكسيد أسود حراري (100 / عبوة)

The black oxide finish on these screws looks great and resists rust better than the plain steel ones I've used before. They threaded smoothly into my jig fixture without any binding, and the nylon pellet provides that extra locking security. Perfect for tooling applications where vibration is a conc

I needed some extra holding power for a jig I was building, and the hex socket drive on these screws made installation a breeze with just an Allen key. The black oxide finish has a nice, consistent look that doesn't feel cheap, and they threaded cleanly into pre-tapped holes without binding.

The partially threaded design made these perfect for my jig setup, gripping securely while leaving the head flush. They drove in cleanly with a hex key, and the black oxide finish hasn't shown any wear after several adjustments.