Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R4222B1017 found under Relay Electromagnetic by Bally Case And Cooler Inc. The National Stock Number assigned to this part is 5945013218025, 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 R4222B1017.