Casement window system and components and hardware therefor

A casement window comprising an injection molded rectangular window frame having a perimeter formed by a header, a sill, and first and second jambs which define an opening through said frame, said frame having a front side and a rear side and being molded to provide an interior wall formed with an inwardly stepped circumscribing wall portion towards the rear side of said frame, said stepped wall portion extending the full length of said jambs and having predetermined spaced hardware locating and fastener receiving receptacles whose relative positions are precisely coordinated formed therein, a sash comprising a rectangular sash frame having a glazing unit retained therein, said sash frame being hinged to the stepped wall portion of said first jamb to swing about an axis located within both said window frame and said sash frame between an open and a closed position, a slideable locking member to lock and unlock said sash frame respectively when said sash frame is swung to the closed position, said locking member being slideably mounted on the stepped wall portion of said second jamb and secured thereto by fasteners driven into the hardware locating and fastener receiving receptacles of said second jamb, a control for operating said locking member, and means for swinging said hinged sash between said open and closed positions, said sash frame comprising a one piece injection molded frame having a rectangular perimeter and molded with hinge and hardware mounting formations having spaced apart mechanical fastener receiving and hardware locating receptacles on opposite sides thereof inset from the perimeter thereof, said sash being hinged to said first window frame jamb by hinge members secured respectively to the stepped formation of said first jamb and the hinge and hardware mounting formation at one side of said sash frame, said hinge members being connected by hinge pins, and hardware secured to the hinge and hardware mounting formation at the side of said sash frame opposite to said hinge members by fasteners driven into said sash frame receptacles, said latter hardware being adapted to cooperate with said window frame slideable locking member in the locking and unlocking of said sash when in the closed position.