Flang Nut Material :45 Steel,40Cr ,after heat treatment is Grade 10 we also can develop new model following your drawing Flang NutSpecification: M16-M64Grade Range: 4, 5,6,8,10,14Material: Low carbon steel, Middle carbon steel, Complex steelFinishing: Blacking, Galvanized, Phosphatingwe also can develop new model following your drawing Flang Nut