Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 48911-506 found under Transformer Radio F by Boeing Company The. The National Stock Number assigned to this part is 5950008899946, 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 48911-506.