Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number L5871090-003 found under Disk Valve by Downey Manufacturing Inc. The National Stock Number assigned to this part is 1650011662588, 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 L5871090-003.