HOLO-KROME 73136 براغي ذات رأس مقبس 1/2-20 × 1-3/4 بوصة | محرك مقبس سداسي | فولاذ سبائكي مع أكسيد أسود حراري (50 / عبوة)

The black oxide finish on these screws is holding up perfectly in my jig setup, no galling at all. They threaded smoothly into tapped holes without any binding.

Finally, socket cap screws that thread cleanly without galling—the black oxide finish on these is surprisingly durable. I used them on a custom tooling fixture and every single one fit perfectly the first time.

Perfect alignment for my drill press jig — the 1/2-20 threads chased in cleanly with no binding, and the thermal black oxide finish gives them a nice grip against corrosion. They’re exactly the right length for heavy-duty fixture builds.