براغي رأس مقبس M8-1.25 × 20 مم | رأس زر بمقبس سداسي | كامل الخيط | فولاذ سبائكي درجة 12.9 مؤكسد أسود حراريًا (200/عبوة)

These are holding up great on my jig fixtures after a month of heavy use, and the black oxide finish hasn't chipped at all. The 12.9 grade steel gives me confidence they won't snap under torque.

The black oxide finish on these screws is holding up great in my shop jig setup without any rust. They threaded smoothly into pre-tapped holes and the hex socket seated perfectly with no stripping. Definitely a solid batch for precision assembly work.

Finally found some M8 button heads that fit perfectly into my jig's counterbored holes without sticking up. The black oxide finish cleaned off easily with a little alcohol, and every one of the 200 screws threaded smoothly into my aluminum fixtures.