براغي رأس كبس M6-1 × 14 مم | رأس مسطح محرك سداسي | ملولبة بالكامل | فئة 12.9 من سبائك الصلب مع أكسيد أسود حراري (600 / عبوة)

Thread engagement was spot on right out of the bag—these seated flush in my jig plate without any binding. The 12.9 alloy steel feels reassuringly solid compared to the usual 8.8 hardware I’ve been using.

Black oxide finish looks proper for machine work, and so far no galling when driving them into my jig plates. I've gone through maybe half the box on a recent fixture build and every single one seated cleanly with a hex key. For the price per piece, having a full pack of 600 means I'm not rationing

After torquing these into my press brake dies, the black oxide finish held up without any galling — exactly what I needed for repetitive alignment work. The hex socket drive is clean and the threading, crisp.