Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 583-1 found under Adapter Pump Hydrau by Donallco Inc. The National Stock Number assigned to this part is 1650004420102, and the Federal Supply Class is 1650 Aircraft Hydraulic Vacuum And De-Icing System Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 583-1.