Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E594-F-4-P-S found under Filter Element Fluid by Gerhardts Inc. The National Stock Number assigned to this part is 4330013796570, 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 E594-F-4-P-S.