Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number W2-2500-500 found under Ring Piston by Parker Hannifin Ltd. The National Stock Number assigned to this part is 2805012944379, and the Federal Supply Class is 2805 Gasoline Reciprocating Engines Except Aircraft And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like W2-2500-500.