براغي رأس أسطوانية مقاس 1-8 × 3 بوصة | محرك سداسي | حبيبات نايلون | ملولبة بالكامل | فولاذ سبائكي مؤكسد حراري أسود (10 / عبوة)

I've been using these for a jig I built, and the hex socket makes them easy to tighten in tight spaces. The thermal black oxide seems to be holding up well against rust so far.

I used these to secure some heavy jig fixtures, and the hex socket drove smoothly without stripping. The fully threaded length let me get a solid bite even in thicker plates.

The black oxide finish on these screws looks clean and should resist rust well in my tooling setup. The 3" length with full threading made them perfect for the jig I was assembling, though I wish they came in a larger pack. They drive in smoothly with a hex key and feel solid.