Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 31009 found under Lamp Incandescent by Espey Mfg And Electronics Corp. The National Stock Number assigned to this part is 6240000115273, 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 31009.