Cabinet Terminology

Cabinet Roses
The back plate behind a cabinet knob or pull.
 

Door Terminology

Active Door
The primary door in a pair of doors and typically has an operable handle set.
Backset
In the U.S. there are two common backsets for residential locks, 2-3/8" and 2-3/4". The backset is the distance from the edge of the door to the center of the 2-1/8" bore hole. We will pack your locks with a 2-3/8" or 2-3/4" latch depending on which backset you specify. Dummy sets have no latch and are surface mounted so you can install a dummy set wherever you choose on the door. [View Backset Diagram]
Center To Center
Tubular Locks require a cut-out in the door as shown. Many doors are factory prepared like this. Typically the center-to-center spacing between the cut-outs is 5-1/2 inches. If this is your case, then most tubular entry locks should fit your door. If you have a different dimension, then a sectional lock may be used. Always verify the center-to center spacing of the lock before ordering. [View Center To Center Diagram]
Clavos
Decorative nails typically applied to the surface of a door.
Door Thickness
All door hardware fits doors between 1 3/8" to 1 3/4" thick. If your door is thicker, you will need to specify its thickness.
Inactive Door
The secondary door in a pair of doors. The inactive door is often secured with flush or surface bolts and typically has inoperable handles.
 

Hinges Terminology

Butt Hinges
Hinges with one leaf mortised to the jamb and one leaf mortised to the edge of the door.
Ornamental Hinge Strap
A decorative piece of metal applied to the surface of a door to mimic a strap hinge.
Strap Hinges
Hinges that have one leaf applied to the surface of the jamb and one leaf attached to the surface of the door.
 

Lock Mechanisms Terminology

American/U.S. Cylinders
Refers to the type of cylinder used with several types of multi-point lock sets. These cylinders are attached to the escutcheon and do not vary in length, but the tailpiece length varies according to door thickness.
Cylinders
A portion of a lock where the key is inserted to lock or unlock the set. There are several different kinds common to different hardware sets.
Dead Bolt
A locking mechanism that is separate from the latching mechanism in a door set. A dead bolt can be locked by a key or a turn piece.
Edge Pulls
Used to retrieve a pocket door from the pocket.
Emergency Release
This term refers to the capability of a lock to be unlocked from the exterior side in case of an emergency situation. This is an aspect of most interior privacy lock sets. Most hardware provides an emergency release key with privacy lock sets.
Eurpoean Profile Cylinders
The other type of cylinder used with multi-point lock sets. These cylinders slip through the exterior escutcheon, the door and the interior escutcheon and are held in place by a set screw through the edge of the lock and vary in length for different door thicknesses.
Flush Pulls
Recessed pulls used on sliding doors such as pocket or bypass doors.
Handing
Indicates where the door is hinged and the direction it swings. Please see the chart. [View Door Handing Chart]
Mortise Bolt
A locking mechanism that is separate from the latching mechanism and is operated by a turn piece. It is commonly used for interior applications to provide privacy on bedroom and bathroom doors.
Mortise Cylinders
Mechanisms that are threaded into mortise locks, secured by a set screw through the edge of the lock and vary in length for different door thicknesses.
Mortise Lock
This mechanism integrates the locking and latching mechanisms into a single cartridge style lock. The mortise lock is available in a variety of functions such as entry, patio, privacy and passage.
Multi-Point Lock Mechanisms
Mechanisms that latch the door at several points along the length of the door instead of a single point in close proximity to the handle. Multi-point locks are provided with French doors made by most of the major window manufacturers. Due to the variety of multi-point sets available, we recommend that a copy or photo of the existing lock trim or a factory drawing be sent to us so our trim can be machined correctly to match the lock in the door.
Rim Cylinders
Mechanisms used in dead bolts that are mounted with screws from the opposite side of the door. They do not vary in length, but the mounting screw and tailpiece lengths vary according to door thickness.
Spring Latch
A latching mechanism operated by the handles.
 

Lock Terminology, General

Dummy - Full
This is a set with inoperable handles on both sides of the door (typically used in conjunction with roller catches, flush bolts or surface bolts).
Dummy - Single
This is a set with an inoperable handle on one side of the door (typically used in conjunction with roller catches, flush bolts or surface bolts).
Entry (Double Cylinder)
This is a locking set with operable handles that has a keyed cylinder on both sides of the door (typically used on primary exterior doors).
Entry (Single Cylinder)
This is a locking set with operable handles that has a keyed cylinder on the exterior side of the door and a turn piece on the interior side (typically used on primary exterior doors).
Passage
This is a non-locking set with operable handles (typically used on doors that do not require security or privacy such as closets, laundry or utility rooms, pantry, mechanical rooms and so on).
Patio
This is a lock set with operable handles that is locked by a turn piece from the interior side, but has no keyed access from the exterior (typically used on secondary exterior doors).
Privacy (Mortise Bolt or Mortise Lock)
This is a locking set with operable handles that is locked by a turn piece from the interior side and can be unlocked by an emergency release key from the exterior side (typically used on bedroom and bathroom doors).
Privacy (Spring Latch)
This is a locking set with operable handles that is locked by a push button on the escutcheon from the interior side of the door and can be unlocked by an emergency release key from the exterior side (typically used on bedroom and bathroom doors).
Push/Pull
This is a set with inoperable grip handles and/or escutcheons. The set can have locking capacity in single cylinder, double cylinder or patio applications and is available in full or single dummy as well (typically used for commercial applications).
 

Lock Trim Terminology

Escutcheon
Back plate that attaches to the door. [View Trim Diagram]
Handle
The portion of the set you grab to pull or rotate. The handle options are grips, levers, knobs or ring pulls. [View Trim Diagram]
Swing Cover
The flap that covers the cylinder or the emergency release access. [View Trim Diagram]
Thumb Piece
This piece retracts the latch bolt on a thumb latch entry lock set. [View Trim Diagram]
Turn Piece
This piece operates the dead bolt on the interior side of a locking set. [View Trim Diagram]
 

Miscellaneous Terminology

Living Finish
A "living finish" means that the hardware is not coated, and the finish may change and darken due to oxidation and wear, much as a copper penny will darken and change over time.



Note: This glossary of terms is provided to the consumer as a service, is provided as-is, and is subject to change. Terms here are provided by LocksUSA.com and are in no way complete or definitive. Please verify all terms with your salesperson, locksmith, or contractor.

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