... : chroming, heat treatment, standard: ISO,ANSI No.2 Machinery transmission sprocket:16A-18T, material:C45/A3, surface: heat treatment, standard: ISO ... , ANSI No.3 Machinery transmission sprocket: 12A-1-15T, material: C45\A3, surface: zinc plating, heat ... treatment, standard: ISO, ANSIOur stockProduction line ANSI rear axle forging bevel gears