براغي رأس مقبس مقاس M2-0.4 × 20mm | محرك مقبس سداسي | ملولبة بالكامل | فولاذ سبائكي فئة 12.9 مؤكسد أسود حراريًا (400 / عبوة)

The black oxide finish on these M2 screws looks professional and the hex drive seated perfectly on my jig fixture. Threads cut cleanly into 6061 aluminum without any binding. A solid choice for precision work.

Was pleasantly surprised by the consistency of the black oxide finish across all 400 screws—no bare spots or uneven coloring. Used them for a precision assembly fixture and the Class 12.9 hardness made tightening to spec feel solid without any stripping.

Putting together a jig for small electronics and these M2 screws worked perfectly. The black oxide finish looks clean and seems more durable than the plain steel ones I've used before. Thread engagement was smooth all the way down on every single one from the pack.