Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CS6664 found under Transformer Radio Frequency by Coil Specialty Co Inc. The National Stock Number assigned to this part is 5950004797625, 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 CS6664.