براغي رأس كبس M2-0.4 × 3 مم | رأس زر محرك سداسي | كاملة الخيوط | فولاذ سبيكة درجة 12.9 أسود حراري مؤكسد (400 / عبوة)

I needed some precise fasteners for a small robotics jig, and these M2 button heads fit the hex driver perfectly. The 12.9 alloy steel feels very sturdy, and the black oxide hasn't chipped or scratched during assembly.

I needed a few hundred of these for a batch of jigs, and every single screw threaded cleanly into the tapped holes without binding. The hex socket drive grips the driver firmly, which makes them easy to seat in tight spots. A solid choice for precision assembly work.

The black oxide finish looks properly done and they’ve held up well threading into aluminum jigs without binding. I’ve used about half the pack on a small fixture build and every single screw has engaged cleanly, which is more than I can say for other bulk M2 lots I’ve tried.