Pack your locks with a 2 3 8 inch or 2 3 4 inch latch depending on which backset you specify.
Standard door lock backset.
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The most common backset is 2 3 8 but 2 3 4 is also quite common usually used on exterior doors.
And you might find all three on a residential home or a 2 3 8 on a commercial building.
This dimension is used for all types of locking devices including cylindrical and mortise locks as well as deadbolts and handle sets.
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In the united states there are two common backsets for residential door locks.
Standard backsets are either a 2 3 8 backset or 2 3 4 backset.
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 backset is the distance from the edge of the door to the center of the 2 1 8 inch bore hole.
2 3 8 inches and 2 3 4 inches.
While some lock locations are fairly standard they can vary based on hardware design manufacturer and region.
As commercial hardware normally uses a 2 3 4 backset while residential uses 2 3 8 backset.
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2 3 8 2 3 4 or 5 backset.