Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 666144-154 found under Lampholder by Bae Systems Information And Electronic Systems Integration Inc Div Bae Systems. The National Stock Number assigned to this part is 6250007299621, 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 666144-154.