براغي رأس أسطواني M3-0.5 × 20 مم | محرك سداسي داخلي | ملولبة بالكامل | فولاذ سبائكي فئة 10.9 أكسيد أسود حراري (900 / عبوة)

Used these for mounting a small jig onto my CNC router's workholding plate, and the hex socket drive made installation quick with an Allen key. The 20mm length was spot-on for the assembly depth I needed. Finished the job in half the time I expected.

The black oxide finish on these M3 screws is holding up well against the oil and grime in my workshop. They thread cleanly into the tapped holes on my jig fixtures without any binding.

I’ve been using these on some precision tooling fixtures at work, and the black oxide finish is holding up well even with regular handling. The hex socket drive makes them easy to torque down consistently with a hex key. Exactly what I needed for M3 applications.