The BIS Certification of Steel Roller Chains Type S and C, Attachments and Chain Wheels is based on IS 2637:2004. This standard is developed to assess quality, strength, and dependability of Steel Roller Chains for Industrial Transmission and Material Handling. It specifically outlines the basic requirements with respect to the dimensions, materials, mechanical properties and construction of Type S and C Roller Chains, Attachments, and Chain Wheels. These chains are predominantly used in industries for the power transmission and conveyor systems to be of high durability, accuracy, and operational smoothness. Compliance to IS 2637:2004 specifies the chains and wheels made of steel possess endorsed wear resistance, tensile strength, and operational effectiveness under extreme loads and chronic operational exposure. BIS Certification in India is compulsory for manufacturers of Steel Roller Chains and Chain Wheels as it signifies the certification holder adheres to the mandated quality and safety standards of the country. The ISI mark on the products is a guarantee of uniform quality, durability, and reliability in application for substantial periods in the industry.