Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MPI-R577-013-005 found under Switchradio Frequency Transmiss by Metropole Products Inc. The National Stock Number assigned to this part is 5930016898013, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MPI-R577-013-005.