براغي رأس مقبس M5-0.8 X 25mm | رأس زر بمحرك سداسي | خيط كامل | سبائك فولاذية فئة 12.9 بأكسيد أسود حراري (400 / عبوة)

Put these into a jig for some precision drilling fixtures and the hex drive seated perfectly without any stripping. The black oxide finish has held up well against handling so far.

Was pleasantly surprised by how consistent the thread cutting is across all 400 pieces — every one threaded into my jig fixture smoothly without any binding. The black oxide coating also seems more durable than the cheap zinc ones I've used before.

Had to replace some worn-out bolts on a jig at work, and these M5s fit perfectly with no stripped threads. The black oxide coating looks consistent across all 400 pieces, which saves me from sorting through rejects. Definitely grabbing another pack for future tooling projects.