براغي رأس أسطوانية M2-0.4 × 6 مم | محرك سداسي | ملولبة بالكامل | فولاذ سبائكي فئة 12.9 أسود حراري (600/عبوة)

Installed a batch in a small jig build—every single screw threaded cleanly without binding. The black oxide finish looks uniform and seems to resist the shop oils nicely.

These are holding up perfectly in the jig I built for a small production run—the black oxide finish hasn’t chipped at all after a week of use. The hex socket drive makes them easy to torque down without stripping, even at this tiny M2 size.

Just swapped out some cheap screws on a 3D printer hotend with these M2-0.4 x 6mm ones, and the 12.9 alloy steel is noticeably tougher—no stripping when torquing down. The hex socket drive bit seated perfectly, and the black oxide finish gives them a nice, consistent look against the aluminum. Great