Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NS4038 ASSEMBLY AC 3 4 IN found under Stator Tube Transmission by National Oilwell Varco Inc. The National Stock Number assigned to this part is 2520011871227, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NS4038 ASSEMBLY AC 3 4 IN.