براغي رأس أسطوانية M5-0.8 × 90 مم | رأس مسطح بمحرك سداسي | سنون جزئية | فولاذ سبائكي فئة 12.9 أكسيد أسود حراري (100 / عبوة)

Installed these on a few tooling fixtures in my shop, and the 12.9 alloy holds up way better than the 8.8 grade I usually buy. The flat head sits flush in counterbored holes without binding, and the black oxide finish should keep rust away in humid conditions.

I needed longer screws for a jig I’m building, and these 90mm M5s fit perfectly with no wobble. The hex socket drives smoothly without stripping, and the black oxide finish gives them a clean, professional look.

The black oxide finish is holding up nicely so far, and the 12.9-grade steel feels genuinely tough when I torque them down on my jig. The 90mm length gives me just enough bite for a thick clamping setup, which was exactly what I needed for this batch of fixtures.