براغي رأس أسطوانية M3-0.5 X 8mm | محرك سداسي | ملولبة بالكامل | فولاذ سبائكي درجة 12.9 أكسيد أسود حراري (900/عبوة)

I needed a lot of small fasteners for a jig I was building, and these M3 black oxide screws hold tightly without stripping. The finish looks professional against the metal, and having 900 in a pack means I won't run out mid-project.

The hex socket drive engaged perfectly with my T-handle allen wrench, and the black oxide coating hasn't shown any signs of wear after assembling three dozen machine fixtures. These hold torque better than the standard 8.8 grade screws I was using before.

Finally, a pack of M3 screws that actually has consistent threading all the way down. The black oxide finish is evenly applied and hasn't chipped during assembly on my jig fixtures.