Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 018-0008-22 found under Piston Valve by Portland Valve Llc. The National Stock Number assigned to this part is 4810011890924, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 018-0008-22.