M12-1.75 X 100mm 內六角螺絲 | 六角驅動 | 部分螺紋 | 12.9級合金鋼熱黑氧化物 (50個/包)

The black oxide finish on these M12 socket cap screws looks clean and professional, and the 100mm length was exactly what I needed for my jig setup. They threaded in smoothly without any binding.

Installed these in a tooling fixture at work and the 12.9 alloy steel feels incredibly solid under torque, no stripping or rounding of the hex drive. The black oxide coating gives them a nice, consistent finish that should resist light corrosion in our shop.

Had to replace some stripped bolts on a precision jig, and these M12s threaded in smooth with no binding. The black oxide finish looks clean and should hold up well in my shop.