Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4028020 found under Adapter by Funk Mfg Co. The National Stock Number assigned to this part is 3930001583427, and the Federal Supply Class is 3930 Warehouse Trucks And Tractors Self-Propelled. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4028020.