Parts of a Door (Incl. Frame, Knob and Hinge Diagrams) Feb 21, 2018A door, whether a front door or interior door of a home is a complicated component to the home as you’ll see in our various parts of a door diagrams below which includes illustrations of a door, door frame, hinge and knob. wwwa A metal plate affixed to a door jamb with a hole or holes for the bolt of the door. The strikeplate latches to the strike when engaged. Sweep. An energy-efficient and weather-resistant weatherstripping system at the bottom of the door that forms a seal against air and water infiltration between the door and the sill.