Parts such as the Cylinder Block-oil Pan: Bolt,sealing 22mm, Bolt A, Mt Brkt, Pan Comp,oil, Bolt,flange,6x25 are included in the Civic 1999 (x) 4dr Dx (ka) Cylinder Block-oil Pan parts fiche.
Of all the components used in this assembly the Block Assy,cyln is the most expensive.
In this schematic the "Nut,flange,6mm" is used most often.