Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R2421 found under Lamp Incandescent by Hella Aerospace Llc. The National Stock Number assigned to this part is 6240661349372, 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 R2421.