Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E40-4-9 found under Impeller Heater Bit by Aurora Pump. The National Stock Number assigned to this part is 4320001115162, and the Federal Supply Class is 4320 Power And Hand Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like E40-4-9.