براغي رأس كاب بمقبس سداسي M8-1.25 X 55mm | رأس زر بمقبس سداسي | خيط كامل | فولاذ سبائكي فئة 12.9 بأكسيد أسود حراري (100/عبوة)

Had to replace some worn-out bolts on a jig at work, and these threaded in perfectly with the hex drive. The black oxide coating feels tough and the 12.9 alloy steel gives me confidence they won't snap under load.

Finally, bolts that don't strip out when I'm torquing them down for jig fixtures—the Class 12.9 alloy steel feels rock solid under load, and the black oxide finish slides into tight pilot holes without binding.

The black oxide finish on these hasn't chipped at all after a week of use in my jig setup, and the hex socket drive seated perfectly with my Allen key. They threaded into tapped holes with zero binding, which is more than I can say for other cheap packs I've tried.