Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PX002500AV found under Ring Piston by Campbell Hausfeld Co. The National Stock Number assigned to this part is 4310012344820, and the Federal Supply Class is 4310 Compressors And Vacuum Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PX002500AV.