Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NAS818-4 found under Plug Protective Dust And Moistur by California Gasket And Rubber. The National Stock Number assigned to this part is 5340008170912, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NAS818-4.