براغي رأس مقبس M2.5-0.45 × 20 مم | رأس مسطح محرك مقبس سداسي | ملولبة بالكامل | فئة 12.9 سبيكة فولاذ أكسيد أسود حراري (600/عبوة)

Used a few of these in a precision jig today and the black oxide finish wiped clean without any fuss. For 600 pieces at this price, the class 12.9 hardness feels like a solid deal, and they threaded smoothly into a tapped hole without any binding.

The hex socket drive grips the Allen key perfectly with no stripping, and the 12.9 alloy steel feels seriously tough for the price. I've used about a hundred of them on my jigs so far and not one has snapped or rounded out.

The black oxide finish on these M2.5 screws looks uniform and hasn't chipped after torquing them into several jig fixtures. Class 12.9 strength gives me confidence they won't strip out mid-assembly, and the hex socket drive seats cleanly every time. A full 600-pack means I've got plenty for future p