Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number QB78222-98 found under Transformer Audio F by Aero International Incorporated. The National Stock Number assigned to this part is 5950009761380, 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 QB78222-98.