M6-1 x 60mm 內六角螺絲 | 平頭內六角驅動 | 半牙 | 10.9 級合金鋼熱處理黑化 (200 顆/包)

The black oxide finish is holding up well on these, and the hex drive seated cleanly in my allen wrench without any stripping. Sixty millimeters is exactly right for my current fixture setup, though the box of 200 will last me a long while.

Installed these in a custom jig at work and the partially threaded design made alignment way easier than fully threaded screws. The hex socket drive grabbed nicely with no cam-out, and all 200 came with clean threads and consistent finish.

The black oxide finish on these M6-1 x 60mm screws is uniform and clean, and the hex socket drive grabs the Allen key perfectly every time. Threading them into my tooling plates was smooth, no binding or stripped heads, and the 10.9 grade gives me confidence they'll hold up under repeated torque.