Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B74N0002-3121 found under Resistor Network Fi by Mcdonnell Douglas. The National Stock Number assigned to this part is 5905010708925, 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 B74N0002-3121.