Diamond Chain Standard Series Chains are built to ASME / ANSI B29.1 standards for dimensions, interoperability, and sprocket fit. Though it's referred to as standard chain, it's anything but. Our Standard Series chains, built to ANSI B29.1 standards, are manufactured to very specific requirements. The only thing standard about our chains is their ability to fit many standard applications. From industry to agriculture, our Standard Series chains are designed to last longer than any other manufacturer's chain.