Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R685-4D1000 found under Relay Electromagnet by Electronic Specialty Co. The National Stock Number assigned to this part is 5945006867236, 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 R685-4D1000.