براغي رأس تجويف M6-1 × 140 مم | محرك تجويف سداسي | ملولبة جزئيًا | فولاذ سبائكي فئة 12.9 أكسيد أسود حراري (50/عبوة)

The hex drive engagement on these M6 socket cap screws feels incredibly precise, and the thermal black oxide finish seems durable. I used them to secure a base plate on a custom press fixture, and the 140mm length was perfect for the deep reach I needed without any wobble.

I used these for a tooling jig I’ve been building, and the 12.9 alloy steel feels rock-solid under clamping loads. The partial threading on the 140mm length let me get just the right grip depth without extra clearance issues.

Finally, a cap screw that doesn't strip out under high torque—these M6-1 x 140mm handles like a dream in my jig fixtures. The thermal black oxide finish feels durable and resisted scratches during assembly.