A sample from the products for the Throttle Body include: Bolt,flange,6x45, Ring,racv Seal, Screw-wash.,5x20, Nut,flange,6mm.
The eight Civic 2005 (5) 4dr Gx Abs/side Srs (ka) Throttle Body component parts are all listed in this schematic.
On this parts fiche the Screw-wash.,5x20 is the most specified component.