Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MX-408 U found under Resistor Current Regulating by Amperite Co Inc. The National Stock Number assigned to this part is 5905002586791, and the Federal Supply Class is 5905 Resistors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MX-408 U.