M12-1.25 X 55mm 內六角螺絲 | 內六角驅動 | 全螺紋 | 12.9級合金鋼鍍鋅 (50 / 包)

Needed some high-strength fasteners for a custom tooling fixture, and these Class 12.9 alloy steel screws handled the torque perfectly. The hex socket drive engaged my wrench without any slipping, and the zinc plating has a clean, even finish.

The threading on these M12 cap screws is perfectly clean, and the 12.9 alloy steel feels seriously tough straight out of the package. I used a full dozen for a jig build and every single one seated without any binding.

The hex socket drive on these worked great with my torque wrench, and the zinc plating looks clean and durable. Only minor thing is the 55mm length was a hair shorter than I hoped for my jig setup, but the threads are perfectly cut. Solid buy for precision work.