براغي رأس أسطواني M8-1.25 X 12mm | رأس كروي محرك سداسي داخلي | كامل الخيط | فئة 12.9 فولاذ سبائكي أكسيد أسود حراري (400/عبوة)

Finally found black oxide bolts that don't chip just from the hex key. These M8s seated perfectly into my fixture plate and hold torque without stripping. Exactly what I needed for high-stress tooling.

Got these for a jig I’m building and the black oxide finish looks properly machined, plus the 12.9 alloy hardness means I don’t worry about stripping the hex on the 12mm length. All 400 came in a neat box, counted them all, no duds.

The hex socket drive made installation a breeze with my Allen key, and the black oxide finish looks clean on my jig setup. These 12.9 alloy steel screws feel incredibly solid for the price, perfect for tooling projects where you need reliable clamping force.