Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 819-000-0021 found under by Advertising Inc. The National Stock Number assigned to this part is 5950001138988, 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 819-000-0021.