Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NPN2X5 3 4 found under Tube Radiator by Mtu America Incorporated. The National Stock Number assigned to this part is 2930011092770, and the Federal Supply Class is 2930 Engine Cooling System Components Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NPN2X5 3 4.