HOLO-KROME 87090 M6-1 X 15mm براغي ذات رأس أسطواني بمقبس سداسي | رأس مسطح بمقبس سداسي | فولاذ سبائكي مع أكسيد أسود حراري (100 / عبوة)

I needed some strong screws for a precision assembly, and the black oxide finish on these gives them a nice, uniform look. They thread in smoothly with no binding, and the flat head sits perfectly flush.

I bought these for rebuilding a jig fixture at work, and the black oxide finish held up perfectly against the cutting oil without any signs of rust. They drive in smoothly with a hex key and grip tight without stripping, which is exactly what I needed for precision assemblies.

The flat head sits perfectly flush when countersunk, which made a huge difference in my jig assembly. The black oxide finish also gives them a nice uniform look without any residue issues.