Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 409 53037 3 found under Filter Band Suppres by The Boeing Company. The National Stock Number assigned to this part is 5915013827220, 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 409 53037 3.