2 3 8 inches and 2 3 4 inches.
What does backset mean for door hardware.
For example a right hand door is hinged on the right and swings to the right.
If you dont have any hardware on your door just measure from the edge of the door to the center of the bore hole the large hole where the door knob assembly is mounted.
You need to know the spindle s width and thread count to make sure new hardware is compatible with it.
Backset the measurement from the bore hole to the edge of the door.
To add to this there are also 57mm and 44 46mm backset locks found on many short body locks however they are generally still referred to as 60mm and 45mm backset locks.
Bore hole and cross bore standard door prep is 2 1 8 bore hole with 1 cross bore.
The door prep image seen to the left applies to any standard tubular lock or latch set including interior door knobs door levers deadbolts entry door handle set and door handle plates.
The backset is the distance from the edge of the door to the center line of the prepared cross bore hole drilled to install most locks.
If you intend to use new locks or latches on an old door replacing your old ones you will need to make sure the new one fits into the hole in the door.
In the united states there are two common backsets for residential door locks.
Beyond parts there are a few more terms you might find helpful when it comes to purchasing and installing your door hardware.
Other door hardware terms.
Door thickness standard doors are 1 3 8 1 3 4 thick.
To do this measure the backset distance of your old lock.
The metal rod on which knobs and levers are mounted.
The horizontal distance measured from the edge of the door to the center point of the bore hole.
Standard backsets are either a 2 3 8 backset or 2 3 4 backset.
If you don t have any hardware on your door just measure from the edge of the door to the centre of the bore hole the large hole where the door knob assembly is mounted.
Some door hardware comes with an adjustable backset some you have to specify what you need.
You can see the bore hole that is 2 1 8 in diameter.
Backset is the distance from the front of the lock to the centre of the spindle as shown here.
If your doors are different than this please contact us for help.
The device on a door that catches the door frame to shut the door securely.
