On this parts fiche the Bolt Flange,6x14 is the most specified component.
The most reasonably priced component used on the Civic 1993 (p) 4dr Lx (ka,kl) Rear Door Windows is the Nut,flange,6mm.
A sample from the products for the Rear Door Windows include: Reg Assy L Rr Dr, Bolt-wash.,6x12, Bolt,flange,6x50, Glass Assy R,rr D.