Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 401-0004-120 found under Relay Electromagnet by Rockwell Collins Aerospace. The National Stock Number assigned to this part is 5945011286709, and the Federal Supply Class is 5945 Relays And Solenoids. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 401-0004-120.