Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 40063 PART NO.10 found under Lampholder by L L Rowe Company. The National Stock Number assigned to this part is 6250015220333, 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 40063 PART NO.10.