Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 428920 found under Tube Anti Icing Air by E A Patten Co The. The National Stock Number assigned to this part is 2840008081016, and the Federal Supply Class is 2840 Gas Turbines And Jet Engines Aircraft Prime Moving And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 428920.