M12-1.75 X 90mm 소켓 캡 볼트 | 육각 소켓 드라이브 | 부분 나사산 | Class 12.9 합금강 아연 도금 (25개/팩)

The threads are clean and true, no burrs right out of the package, and the zinc finish looks uniform. These feel substantially stronger than the grade 8.8s I've used before, which gives me real confidence in my tooling fixtures. Definitely ordering another pack when I run low.

I needed 90mm length for a jig fixture and these fit perfectly with the 12.9 hardness holding up under heavy torque. The zinc plating looks clean and consistent across all 25 screws.

The partially threaded design on these M12 screws made aligning them in my jig fixture much simpler than with fully threaded bolts. They threaded smoothly into tapped holes without binding, and the zinc coating looks clean and even across all 25 pieces.