Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 327990 found under Filter Element Fluid by Western Filter A Division Of. The National Stock Number assigned to this part is 4330000083584, 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 327990.