Hardware 101

Hardware Terms

· Back Plate: an oval or rectangular plate that holds the doorknob in place

· Backset: distance of the center of the doorknob or key cylinder from the edge of the door; most residential doors have 2 3/8” and most commercial doors have 2 3/4” backsets. The ideal backset isone half the width of the stile.

· C to C: the distance between screw holes measured from center to center of the holes.

· Double cylinder deadbolt: has keyed cylinder on both interior and exterior.

· Dummy set: fixed doorknobs that do not turn often used on pairs of doors.

· Escutcheon: keyhole plate.