براغي رأس أسطوانية سداسية 3/8-16 X 3" | محرك سداسي | حبيبات نايلون | سنون جزئية | فولاذ سبائكي مؤكسد أسود حراريًا (50/عبوة)

The black oxide finish on these screws gives them a nice grippy feel when seating them with a hex key, and the nylon pellet locks them in place without needing threadlocker. The partial threading made alignment in my tooling block a breeze, and the 50-pack is enough to cover a couple of projects.

I've used these in a few jig fixtures and the partially threaded design really helped seat things flush without extra spacers. The black oxide finish has held up fine so far, no chips or rust after a couple weeks on the bench.

Installed these on a jig I'm building and the black oxide finish looks great while resisting rust. The partial threading made alignment much easier than expected.