Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2B 4173 found under Relay Electromagnetic by Hi G Co Inc. The National Stock Number assigned to this part is 5945004912039, 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 2B 4173.