Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5S401-122 found under Pipe Assembly No 5 by Coltec Industries Inc. The National Stock Number assigned to this part is 2815000364033, and the Federal Supply Class is 2815 Diesel Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 5S401-122.