A sample from the products for the Srs Unit include: Screw,tapping,(po)4x, Cover,srs Unit L, Holder Conn 2p (cabe, Wire Harn,dash Sr.
The most reasonably priced component used on the Civic 1999 (x) 4dr Lx (ka) Srs Unit is the Screw,tapping,(po)4x.
On this parts fiche the Bolt 6x20. Torx Eart is the most specified component.