Metric roller chain is also known as British standard chains. These are similar to standard roller chain, but metric chain has a few different dimensions.
Meets and exceeds ISO 606, BS 228 and DIN 8187 standards
Roller chain components are shot peened for greater fatigue resistance
Heat treated components for increased durability, longevity and wear resistance
Chain is pre-loaded (Pre-stretched) to eliminate initial stretching.
Chain components are lubricated before assembly, then dipped in a hot oil bath after assembly for maximum coverage between the chain components.