Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M870-1 found under Transformer Power by Payne Magneticsinc. The National Stock Number assigned to this part is 5950014634755, 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 M870-1.