Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BS2-41121 found under by Madison Electric Mepco Inc. The National Stock Number assigned to this part is 6250013528001, 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 BS2-41121.