HOLO-KROME 72192 براغي ذات رأس أسطواني 7/16-14 X 7/8" | محرك سداسي داخلي | سبائك فولاذية أكسيد أسود حراري (100/عبوة)

The black oxide finish on these screws is really consistent across the whole pack—no bare spots or uneven coating. I used them to secure a jig on my mill, and they seated perfectly with a hex key. Exactly what I needed for tooling work.

Every one of the hundred screws threaded cleanly into my jig with zero galling, and the hex socket drove true without stripping. The thermal black oxide gave them a uniform, non-reflective finish that looks proper on the machine build.

I needed a hundred of these for a jig I’m building, and the hex socket drive made installation a breeze with an Allen key. The black oxide coating feels sturdy and resistant to wear, which is perfect for repeated adjustments.