براغي رأس مقبس M12-1.75 × 20 مم | رأس زر محرك مقبس سداسي | كاملة الخيط | فئة 12.9 سبيكة فولاذ أكسيد أسود حراري (100/عبوة)

Finally got these to finish a tooling fixture rebuild, and the 12.9 grade alloy steel really feels solid under torque. The black oxide coating looks consistent across all 100 pieces, no burrs on the threads.

I was replacing some worn jig hardware and these M12 button heads fit perfectly, the hex drive seated without any cam-out. The thermal black oxide seems consistent across all 100 screws, which is nice for a uniform look in the assembly.

The black oxide finish looks sharp in a fixture, and the hex socket drive gripped cleanly without stripping. Threads ran smooth into a tapped M12 hole, though the 20mm length is shorter than it looks in photos—measure twice if you're not sure.