Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TM7728-1 found under Filter High Pass by Marconi Electronics Inc. The National Stock Number assigned to this part is 5915008291514, 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 TM7728-1.