براغي رأس مقبس M3-0.5 X 25mm | رأس مسطح محرك مقبس سداسي | ملولبة جزئياً | فئة 12.9 سبائك فولاذية مؤكسدة حرارياً باللون الأسود (400 / عبوة)

These flat heads sit flush perfectly in the counterbored holes on my fixture plate, and the hex socket drive makes them easy to tighten without stripping. The 12.9 alloy steel feels rock solid—way tougher than the cheaper screws I used to buy.

Got a full 400-count box for a jig build and every single screw threaded clean without any stripped heads. The black oxide finish looks consistent across the batch and the 12.9 hardness feels properly stiff when torquing down.

The partially threaded design made alignment in my jig way easier than fully threaded screws, and the black oxide finish has a nice matte look that resists smudges. At 400 per pack, I’ve got plenty for future builds without worrying about running out mid-project.