Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 25-37599A01 found under Transformer Audio Frequency by Cooper R Jr Inc. The National Stock Number assigned to this part is 5950005818881, 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 25-37599A01.