Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 15523 found under Ballast Lamp by Technical Consumer Products Inc. The National Stock Number assigned to this part is 6250014742840, and the Federal Supply Class is 6250 Ballasts Lampholders And Starters. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 15523.