M12-1.75 x 170mm 外六角螺絲 | 10.9級鋼 原色 | 半牙 (15個/包)

The partially threaded design made it easy to get the perfect grip on my jig fixture without bottoming out. These hex heads took a socket wrench without any slippage, which I really appreciated.

The 170mm length was spot on for bolting down my milling machine, and the partial threading made alignment a breeze. These 10.9 grade bolts feel rock solid under torque, no stripping or wobble.

The 170mm length on these M12 screws is exactly what I needed to reach through a thick bracket on my press; the hex head grabbed cleanly with a socket. Class 10.9 feels plenty strong for the heavy assembly work I'm doing, and the partial threading saved me from having to cut anything down.