Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AB3921648A40BA found under Frame Seat Back by Ford Motor Company. The National Stock Number assigned to this part is 2540016720807, and the Federal Supply Class is 2540 Vehicular Furniture And Accessories. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AB3921648A40BA.