Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 66B119MS found under Transformer Audio F by Hewlett Packard Co. The National Stock Number assigned to this part is 5950009747770, 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 66B119MS.