Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3-1000 found under Lapped Assy Valve H by Downey Manufacturing Inc. The National Stock Number assigned to this part is 1650007125039, 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 3-1000.