Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AN3139R312 found under Lamp Incandescent by Aeronautical Standards Group. The National Stock Number assigned to this part is 6240001557925, 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 AN3139R312.