Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3139510-01 found under Lampholder by Ampex Systems Corp. The National Stock Number assigned to this part is 6250010291921, 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 3139510-01.