Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ETN 673990 found under Control Unit Pneumatic Tire by Daimler Trucks North America Llc. The National Stock Number assigned to this part is 2530014462517, and the Federal Supply Class is 2530 Vehicular Brake Steering Axle Wheel And Track Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like ETN 673990.