M22-2.5 X 200mm 內六角螺絲 | 六角驅動 | 部分螺紋 | 12.9 級合金鋼鍍鋅 (10 個/包)

The threads machined clean and the hex socket fits my driver perfectly with zero wobble. For a 200mm bolt this long, the 12.9 hardness gives me real confidence it won't snap under heavy load in my jig setup.

The hex socket drive made torquing these down on my press tooling so much easier than using a regular wrench. Even at 200mm length, the threading felt precise and clean right out of the package.

Threading these into a jig frame was a breeze thanks to the partially threaded design, and the hex socket drive gives a solid grip without stripping. The zinc plating looks clean and held up fine during assembly.