HOLO-KROME 72158 براغي رأس سداسي 3/8-16 × 1" | محرك سداسي | فولاذ سبائكي مع أكسيد أسود حراري (100/عبوة)

The black oxide finish on these held up perfectly when I used them in a drilling jig, no galling at all during assembly. Exactly the right fit for my precision fixture.

I've been using these on a couple of jig projects, and the consistent thread engagement on every screw is a big time-saver. The black oxide finish gives them a clean, professional look that resists smudging during assembly.

Was a perfect fit for my fixture build—the black oxide finish on these alloy steel screws resists rust well and the hex socket drive makes tightening them much easier than a standard hex head.