M42-4.5 X 400mm 外六角螺絲 | 10.9級鋼材原色 | 部分螺紋 (1/包)

These bolts are heavy-duty and the hex heads gave my socket wrench a solid grip. Used them to secure a large press frame and the partial threading made alignment easy. Exactly the grade 10.9 strength I needed.

Threading is clean and the head fits a standard socket perfectly. Used it to secure a large hydraulic press and it held up without any issues. The 400mm length was exactly what my project needed.

Needed a hefty bolt for a press frame repair, and the 400mm length let me reach through all the layers without needing a coupler. The hex head gave my big socket a solid grip, and the Class 10.9 rating feels reassuring.