براغي رأس مقبس M8-1.25 × 80 مم | رأس مسطح محرك سداسي المقبس | جزئية الخيوط | فولاذ سبائكي فئة 12.9 معالجة حرارياً أسود أكسيد (100 / عبوة)

Installed these on a milling fixture and the partial threading let me get deep into the tapped hole without bottoming out. The black oxide coating hasn't marred at all after tightening with a hex key.

I needed a set of socket cap screws that could handle constant torque in a jig setup, and these partially threaded 80mm lengths seat perfectly without stripping. The thermal black oxide coating already looks durable after a week of assembly work.

These flat head hex socket cap screws fit perfectly into my jig setup, and the partially threaded design holds material securely without slipping. The thermal black oxide finish seems tough and resists any glare in the shop.