Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 9T31Y181 found under Transformer Audio F by General Electric Co. The National Stock Number assigned to this part is 5950000534167, 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 9T31Y181.