Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 659 12639 1 found under Panel Indicating Li by Boeing Aircraft. The National Stock Number assigned to this part is 6220014688403, and the Federal Supply Class is 6220 Electric Vehicular Lights And Fixtures. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 659 12639 1.