Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number APS-137S found under Transformer Power by United Transformer Corp Sub Of O. The National Stock Number assigned to this part is 5950010283752, 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 APS-137S.