براغي رأس مقبس M12-1.75 × 100 مم | محرك سداسي برأس زر | ملولب بالكامل | فئة 10.9 سبائك فولاذ أكسيد أسود حراري (50 / عبوة)

I machined some custom brackets and these M12 button heads seated flush with no wobble. The black oxide coating handled the grease without smearing, and the hex drive took torque evenly from my socket set.

The hex socket drive made installation a breeze, and the black oxide finish feels tough enough for the machine jig I built. Threads were clean and consistent across all 50 pieces, no burrs anywhere. These are solid for the price.

I needed some long, strong bolts for a custom jig, and these M12x100mm ones fit the bill perfectly. The hex socket drive makes them easy to tighten in tight spots, and the black oxide coating seems to resist the oil on my hands better than bare steel.