M12-1.75 X 70mm 六角頭螺絲 | 10.9級鋼鋅鍍 | 部分螺紋 (50入)

I needed some heavy-duty bolts for a workshop jig, and the partially threaded design on these M12s worked perfectly for clamping. The zinc plating looks uniform and should resist rust well.

The threads are crisp and clean on these, and the zinc plating gives them a nice uniform finish. I used them to bolt a motor mount to a frame, and the partial threading allowed just the right amount of shank engagement.

The partial threading made it easy to get them started in a tight engine mount bracket without binding, and the hex heads held up perfectly to torque. I've used cheaper bolts before that stripped, but these class 10.9 units have real bite.