Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 207643-1 found under Synchro Differential Transmitter by Ridge Associates Inc. The National Stock Number assigned to this part is 5990001626080, and the Federal Supply Class is 5990 Synchros And Resolvers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 207643-1.