Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4IB40-174-U35-0-0 found under by Pit Radwar S A. The National Stock Number assigned to this part is 5915016471506, and the Federal Supply Class is 5915 Filters And Networks. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4IB40-174-U35-0-0.