Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DI4640 found under Transformer Power by Laselco Pacific. The National Stock Number assigned to this part is 5950010079443, 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 DI4640.