40 Roller Chain is some of the most common roller chain on the market. Used on anything from agricultural equipment to industrial applications. RollerChainSupply.com supplies brands such and Diamond Sapphire, John King USA, Senqcia Maxco (Formerly Hitachi) and Allied Locke. Diamond Sapphire is dedicated to bringing you a cost effective solution for you roller chain needs. Not seeing what you are looking for? Give us a call and let our dedicated procurement specialists help you eliminate downtime.