Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 423S4291 found under Relay Electromagnet by Abb Inc. The National Stock Number assigned to this part is 5945016321237, 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 423S4291.