Our A Series Roller Chain meet or exceed DIN, ANSI, ... stand up to the toughest working environment. Our A Series Roller Chain meet or exceed DIN, ANSI,ISO,BS, ... RollerMaterial 1035,1045 or 1050Through harden with surface and core 40-45HRCShot peening per the specBUSHINGSolid or Split ... 1045 or 1050Through harden with surface and core 39-45HRCShot peening per the spec 5-Strands A Series Roller Chain