M36-4 X 400mm 소켓 캡 나사 | 육각 소켓 드라이브 | 부분 나사산 | 12.9급 합금강 열처리 블랙 옥사이드

The black oxide finish gives these a nice, even look and they fit perfectly into our jig fixture. The 400mm length is exactly what we needed for this assembly.

The black oxide finish handles the high torque on our press tool jig without any galling. Threads engage smoothly on both the partial and full sections—exactly what we needed for this heavy clamping setup.

Put these in my milling machine's T-nuts, and the 400mm length was perfect for securing a large fixture setup. The black oxide finish matches the rest of my tooling well, and the hex socket drive made tightening them down a breeze.