Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 417503-5 found under Synchro Transmitter by Simmonds Precision Products Inc. The National Stock Number assigned to this part is 5990008184955, 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 417503-5.