... Chain Our Precision roller chain meet or exceed DIN, ANSI,ISO,BS,JS standard. Double pitch C2080H Standard Roller Chain Our Precision ... roller chain meet or exceed DIN, ANSI,ISO,BS, ... future.General Standard for Roller Chain:ROLLERSolid RollerMaterial 1035,1045 or 1050Through harden with surface and core 40-45HRCShot peening ...