براغي رأس مقبس 7/8-9 × 2 بوصة | محرك مقبس سداسي | كرة نايلون | ملولبة جزئيًا | فولاذ سبائكي بأكسيد حراري أسود (10 / عبوة)

The nylon pellet inside these hex socket screws really locks them in place under vibration, which is perfect for my precision assembly work. Fit was spot-on in my 7/8-9 tapped holes, and the black oxide finish looks clean.

I needed some sturdy screws for a jig build, and these 7/8-9 x 2" socket cap screws fit perfectly with the hex socket drive. The black oxide finish gives them a professional look against the steel. I’ve already used a few and they hold tight without any stripping.

The thermal black oxide finish looks properly even across every screw, and the hex socket drive took my Allen key without any slop. Threads are clean and the nylon pellet should do its job for locking. These feel like they're made for serious tooling work.