براغي رأس مقبس M14-1.5 X 60mm | محرك مقبس سداسي | ملولبة جزئيًا | فولاذ سبائكي فئة 12.9 مؤكسد أسود حراريًا (25 / عبوة)

These bolts cinched down the guide rails on my milling table perfectly, and the threading cut cleanly into the M14 tapped holes without any binding. The black oxide finish held up well against a few drops of cutting oil during the install.

Used a couple to mount a heavy vise to my workbench, and the 12.9 alloy steel handled the torque without any stretching. The thermal black oxide finish gives them a nice grip in the hex socket too.

Installed these in a jig fixture I’m building, and the class 12.9 alloy steel feels much tougher than the standard 10.9 screws I used before. The hex socket drive gave a solid bite with no stripping during torquing.