Grey Torx Screw are also of normal screw quality, it’s just a grey coating.
Hardened Star Torx Screw for Milling Cutters are offered that come with precision design and construction standards. These torx screw are hardened up to 50-55 HRC for wear resistance. These Torx screw are mainly used in indexable tools, such as boring bars, insert cutters, and milling cutters. They are precise screw for a better grip of the carbide insert with a pocket.
