Grey Torx Screw are also normal screw quality, it’s just a grey coating
Hardened Star Torx Screw for Milling Cutters are offered. These Torx screws are precision-engineered and meet 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 carbide insert with pocket
