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  Door Hardware Glossary
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Door Part Descriptions and Door Functions

 

 Bolt - The metal piece that extends and secures a door
 Cylinder - The round portion of the lock that accepts the key and enables the locking mechanism
 
Deadbolt - A lock bolt that is moved by turning a knob or key

A single cylinder deadbolt is most often used on a front or back exterior door and is locked with a key from the outside of the home and a thumbturn on the inside. A double cylinder deadbolt is operated with a key from both the outside and inside of the home. Double cylinder deadbolts are recommended when a window is close to the door. The interior keyway prevents an intruder from breaking the glass and turning the thumbturn to open the door. A one-sided deadbolt has no exterior entry mechanism and a thumbturn on the interior of the door.
 
Handleset - The exterior door hardware that has a grip or, handle along with a deadbolt funtion to lock the door. When ordering, be sure to also add the corresponding interior 'trim' 
 
Interior Trim - The knob or lever attached to the inside of the door.
 
Knobset - The door hardware that includes the inside and outside knobs
 
Latch - The mechanism that secures the door when the door is closed. Most Home Hardware Plus products come standard with an adjustable latch, allowing the hardware to be used on doors with either a 2-3/8" backset or a 2-3/4" backset. (The backset is the measurement from the edge of the door to the center of the predrilled hole.)
 
Latchplate- The metal sheet that surrounds the bolt and is mounted to the door edge
 
Leverset - The door hardware that includes the inside and outside levers
 
Mounting Plate - The mounting plate installs on the inside face of the door and holds the interior door trim in place.
 
Rose - The plate surrounding the knob or lever that is flush against the door.
 
Strike - The metal hardware that is mounted to the door frame to receive the latch and/or bolt
 
Surface Bolt - Hardware that projects into the head of the doorjamb, or into the doorsill. Typically used to secure the inactive leaf in a pair of doors.
 
Keyed Entry knobs/levers are typically used on exterior doors. Both knobs lock or unlock by a key on the outside and a thumbturn on the inside. 
 
Privacy knobs/levers are typically used for bedroom and bathroom doors. Both knobs lock or unlock by a flat pin key on the outside or thumbturn on the inside.
 
Passage knobs/levers are typically used for hallway and closet doors. Both knobs are always free to turn.
 
Dummy knobs/levers are typically used on doors when a simple tug on the door will open it or release a catch. A dummy is a single knob that is stationary on the door and does not provide any turning or latching function. 
 
Storeroom levers are always fixed and locked from the outside and must be unlocked with a key.  The inside knob is always unlocked.
 
Classroom levers can be locked or unlocked using a key from the outside only.  There is no button or thumbturn on the interior lever.  The lock is always unlocked on the inside.
 

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