Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A48-21 found under Lamp Incandescent by Aero International Incorporated. The National Stock Number assigned to this part is 6240014751454, and the Federal Supply Class is 6240 Electric Lamps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A48-21.