Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 639-0005 found under Ignition Transformer by Wisconsin Oven Corporation. The National Stock Number assigned to this part is 5950015364262, 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 639-0005.