Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B28C0013-4 found under Reactor by Mcdonnell Douglas. The National Stock Number assigned to this part is 5950005038086, and the Federal Supply Class is 5950 Coils And Transformers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B28C0013-4.