Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B66S0001 found under Synchro Assembly by Mcdonnell Douglas. The National Stock Number assigned to this part is 5990008496060, 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 B66S0001.