براغي رأس مقبس M4-0.7 × 8mm | رأس مسطح بمقبس سداسي | ملولبة بالكامل | فولاذ سبائكي فئة 12.9 مع أكسيد أسود حراري (900 / عبوة)

These little black oxide screws are perfect for tooling jigs, and the hex socket drive makes it easy to get them tight without stripping. The 12.9 alloy steel feels seriously strong for such a small fastener.

I was a bit worried about buying in bulk, but every single screw threads cleanly into my aluminum fixtures without any binding. The black oxide finish looks professional and seems like it will resist rust far longer than the zinc-plated ones I used before.

These M4 screws fit perfectly into my jig fixtures, and the black oxide finish shows no signs of wear after repeated use. The hex socket drive makes them a breeze to tighten with a standard driver. Exactly what I needed for precision assemblies.