Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 225004-2 found under Piston Vacuum Pump by Bei Sensors And Systems Co Inc. The National Stock Number assigned to this part is 4310004258304, 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 225004-2.