براغي رأس مقبس 1/2-13 × 4" | محرك مقبس سداسي | حبيبات نايلون | خيط جزئي | سبيكة فولاذية مؤكسدة سوداء حرارياً (25 / عبوة)

The hex socket drive gripped my Allen key perfectly without stripping, which was my main worry with cheaper screws. These handled the torque on a jig fixture I built without any issue at all.

The black oxide finish really helps these resist rust in my shop, and the hex socket drive made installation quick with an Allen key. I used them to build a heavy-duty tooling jig, and the threads grabbed perfectly.

I needed a solid screw for a jig fixture that would hold up under repeated tightening, and the nylon pellet in these is a lifesaver for keeping the threads locked once set. The hex socket drive makes installation straightforward with a standard Allen key, and the 25-pack gives me plenty for future p