Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R-4026-5 found under Filter Element Intake Air Cleane by Fluitek Corp. The National Stock Number assigned to this part is 4310004710164, 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 R-4026-5.