Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PF440 found under Filter Element Fluid by General Motors Corp. The National Stock Number assigned to this part is 4330000013514, and the Federal Supply Class is 4330 Centrifugals Separators And Pressure And Vacuum Filters. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PF440.