Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2QU 322 found under Ventilator Air Circulating by Mack Trucks Inc. The National Stock Number assigned to this part is 2540011500918, and the Federal Supply Class is 2540 Vehicular Furniture And Accessories. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2QU 322.