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This Standard roller chain is available with pitches from 1/2 to 3 inches. Chain numbers are determined by multiplying the pitch by 80 (a 1/2 inch pitch chain would be a No. 40 chain). A hyphenated suffix indicates multiple strands.ensures the stability and consistency of the key function of comp1nts.corrosion- and wear-resistant coiled tubing injector roller chain & sprocket assemblies for the oil and gas industries. Available in single and double pitch drive chain & sprocket types with various sizes and power rating. Features include zinc-nickel and non-hexavalent chromate protective exterior coating, electrochemically bonded, and interference fit cover plates.40A21SS stainless steel sprocket is manufactured to ANSI specifications and is constructed out of 304-grade stainless steel for corrosion resistance, strength, durability, and to be able to work in low to high temperature environments. This sprocket has 21 teeth, is manufactured for