براغي ذات رأس أسطواني بمقبس 7/16-20 × 2 بوصة | محرك مقبس سداسي | صنع في الولايات المتحدة | فولاذ سبائكي مع أكسيد أسود حراري (250 / عبوة)

The black oxide finish on these is much nicer than I expected for fasteners—it's uniform and looks great on my fixture jig. They threaded cleanly into tapped holes without any binding, saving me time on assembly.

Bought a pack for some jig repairs I had been putting off, and the hex socket drive matched my tools perfectly. They threaded in cleanly with no binding and the black oxide finish gave them a nice, uniform look.

The black oxide finish is so even it almost looks ceramic, and the hex socket drive sits perfectly flush every time. I’ve got about three hundred of these across my tooling now, and not a single one has stripped or fought the driver.