براغي رأس أسطوانية HOLO-KROME 77474 1/4-28 X 2-1/2" | محرك سداسي داخلي | فولاذ سبائكي مؤكسد أسود حراريًا (100/عبوة)

These 1/4-28 screws felt solid when I torqued them down on a jig fixture, and the hex socket drive gripped perfectly without any stripping. Exactly what I needed for precision assembly work.

The black oxide finish on these screws is a nice touch—they slide into tapped holes without binding, and the hex socket drive grabs cleanly every time. I’ve used a handful on a jig so far and they hold up exactly as expected for precision work.

Used these to rebuild a worn-out fixture at work, and the thermal black oxide finish holds up way better than the zinc-plated stuff I usually grab. The hex socket drive seated perfectly with no stripping, and all 100 came out of the box clean and consistent.