براغي رأس كوب M3-0.5 × 6 مم | محرك سداسي برأس مسطح | ملولبة بالكامل | فولاذ سبائكي من الفئة 12.9 أسود حراري (900/عبوة)

The black oxide finish on these M3 screws gives them a nice, uniform look, and the hex socket drive holds up well under torque. I used a handful for a small jig build, and every one threaded smoothly without any binding. Exactly what I needed for precision work.

I needed a bulk supply of M3 screws for a jig I was building, and these 12.9 alloy steel hex drive caps have been holding up perfectly through repeated adjustments without stripping.

The black oxide finish on these M3 screws is evenly applied, and the hex socket drive engaged perfectly with my 1.5mm driver without any slipping. I've just finished assembling a test jig, and every single screw threaded smoothly into the tapped hole.