Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AB44S225 ITEM 23 found under Cap Valve by Parker Hannifin Ltd. The National Stock Number assigned to this part is 4820014977663, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AB44S225 ITEM 23.