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Hardware Glossary


Courtesy of Jeld-Wen Custom Doors

Hardware Glossary

Backset: The horizontal measurement from the edge of the door to the center point of the 2-1/8" holes through the door.

CTC (center-to-center): The vertical measurement from the center point of the bottom through hole to the center point of the top through hole. Fixed measurement for handleset with a full escutcheon, can vary for a sectional handleset.

Conversion Kit: Allows flexibility to adapt handlesets and deadbolts to fit 2" or 2-1/4" thick doors.

Cylinder Collar Spacer: For use with deadbolts to accommodate 1-3/8" thick doors.

Deadbolt: Locking mechanism. Metal bolt which slides from door into frame preventing the door from opening. Security feature for exterior doors.

Double Cylinder Entrance Handleset: Deadbolt operated by key from either side; no turn knob. Frequently used when door has glass panes.

Edge Bore: The hole drilled into the edge of the door to hold lock or latch.

Emergency Exit Entrance Set: Handleset which retracts the latchbolt and deadbolt simultaneously when the inside lever is turned. Provides quick exit in emergency situations.

Escutcheon: decorative backplate, generally larger than 6" in height, on which a knob, lever, or pull is mounted.

Face Bore: The hole drilled through the door, front to back, to hold knob or lever.

Finish: Refers to the color and protective coating of the item.

Full Dummy: Décorative handleset, lever, or knob used on the non-working door of a double door unit. Full dummy trim is on both sides of the inactive door.

Half Dummy: A single knob or lever for a non-latching door. Half dummy is only used on outside of the door. Most commonly used for a push/pull application or on a closet door that does not have a latch.

Hand of Door: The hand of the door is determined by standing on the outside of the door.

Hand Door, Left : If hinges are on the left side of the door when viewing from the outside, door is left handed.

Hand Door, Right : If hinges are on the right side of the door when viewing from the outside, door is right handed. ^Top
Keyed Entry Lockset: Entrance lockset which is locked by a key from exterior and thumbturn from interior. Can be either a knob or lever.

Latch Bolt: The bolt that retracts when either the knob or lever is turned, or when the thumbpiece which operates the handleset is pushed down.

Mortise Lock: This is a traditional style box lock which is installed into a deep pocket or "mortise" in the edge of the door. Usually, the mortise lock houses both the latch and dead bolt in one unit. A characteristic of a mortise lock is that the latch component will lock automatically when you close the door. It can then be double-locked with the deadbolt. A toggle or button on the side of the case allows the user to close the door and leave it unlocked.

Passage Function (Hall/Closet): Knob or lever set most commonly used in hallways where a locking feature is not required.

Privacy Function (Bed/Bath): Knob or lever set most commonly used in bathroom or bedroom; can be locked from the inside with a push button emergency release feature.

Rose: decorative backplate for knobs and levers, often round- or oval-shaped.

Sectional Trim: two-piece door trim: decorative pull and matching cylinder escutcheon.

Single Cylinder Entrance Handleset: Key operates deadbolt from outside; turnpiece operates deadbolt from the inside.

Stile Width: Horizontal measurement from the edge of the door to the edge of the raised molding or glass.

Thumbpiece: Component located on the outside of a handleset which, when depressed, retracts the latchbolt.

Tubular Entry Lock: Is installed into two cylindrical holes drilled through the face of the door. The lower latch is operated by a knob or lever with the help of the spindle. The upper deadbolt is operated with a key on the outside and turnpiece on the inside. These components may have their own decorative trim or be housed within a longer single trim.

Turnpiece: Component located on inside of door which, when turned, retracts deadbolt. Used only on single cylinder operations.