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.
What does backset mean for door hardware.
Most standard door hardware is manufactured to fit 1 3 8 2 thick doors.
This allows you to correctly line up with existing holes in the door rather than drilling new ones.
Beyond parts there are a few more terms you might find helpful when it comes to purchasing and installing your door hardware.
The backset is the distance from the edge of the door to the center of the 2 1 8 inch bore hole.
What is the thickness of a standard door.
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.
You can see the bore hole that is 2 1 8 in diameter.
2 3 8 inches and 2 3 4 inches.
In the united states there are two common backsets for residential door locks.
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.
The inactive door opens only after the active door and is locked in place with flush door bolts or surface mounted door bolts.
The device on a door that catches the door frame to shut the door securely.
The most common sizes here are 44mm and 56mm give or take a few millimetres.
The backset of a door is the distance in inches from the edge of the door to the center of the bore hole.
Standard backsets are either a 2 3 8 backset or 2 3 4 backset.
Most doors are 1 3 8 or 1 3 4 thick.
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.
Mechanism 5 yr.
The distance from the edge of the door to the center point of this bore hole is the backset.
To do this measure the backset distance of your old lock.
Pack your locks with a 2 3 8 inch or 2 3 4 inch latch depending on which backset you specify.
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.
Fits 1 3 8 and 1 3 4 doors adjustable backset 2 3 4 70mm or 2 3 8 60mm instructions for door preparation and installation included mounting hardware screws and latch included two keys included rekeyable kwikset keyway warranty.
Ebuilderdirect door lever handles style 838 are fully reversible from left to right hand and are available in several finishes.
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.
