M36-4 X 400mm 六角頭螺絲 | 強度等級 10.9 鋼 普通 | 部分螺紋 (1 顆/包)

The partially threaded design made alignment a breeze when I was securing heavy equipment to a base plate, though the 400mm length is definitely overkill for most jobs. Still, the hex head gripped my wrench solidly and the Class 10.9 steel feels rigid enough to trust under real load.

These bolts are exactly what I needed for a heavy-duty clamping jig. The hex head made torquing them down with a socket wrench simple and secure.

Threads are clean and the 10.9 grade steel feels seriously solid under a wrench. I used these on a structural jig and the partial thread did exactly what I needed it to. No complaints at this size.