Door Backset Distance

The backset is an important measurement as it specifies the distance from the face of the lock to the centre of the keyhole.

Door backset distance.

If you re installing a lockset in an existing door take out the old lockset and measure the backset the distance from the door edge to the center of the lockset hole. In addition to lasting twice as long as standard door knobs these are made entirely of corrosion resistant materials to stand up to washdown and marine environments. Latch bolt projection is the length the latch bolt extends from the door s edge. Backset the distance from the edge of the door to the center of the lock bore.

2 3 8 inches and 2 3 4 inches. Also known as passage handles they do not lock. The most common backset is 2 3 8 but 2 3 4 is also quite common usually used on exterior doors. Select a handle with the correct backset distance the distance from the door s edge to the center of the handle s mounting hole for your door.

The measurement is usually 2 3 8 inches for interior doors and 2 3 4 inches for exterior doors. Also known as passage knobs they do not lock. Select a handle with the correct backset distance the distance from the door s edge to the center of the handle s mounting hole for your door. The most common sizes here are 44mm and 56mm give or take a few millimetres.

This allows you to correctly line up with existing holes in the door rather than drilling new ones. Select a knob with the correct backset distance the distance from the door s edge to the center of the knob s mounting hole for your door. Backset distance is the distance from the door s edge to the center of the handle s mounting hole. 2 3 4 backset distance.

2 3 4 backset distance. The outside handle is always locked and has to be unlocked with a key while the inside handle can always open the door. Other backsets include 2 used by national and lori lock and 5 used by weiser weslock kwikset and others. Backset is the distance from the front of the lock to the centre of the spindle as shown here.

Latch bolt projection is the length the latch bolt extends from the door s edge. 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. Two standard backsets are 2 3 8 and 2 3 4. For frequently used doors these handles last twice as long as standard door handles.

Pack your locks with a 2 3 8 inch or 2 3 4 inch latch depending on which backset you specify. In the united states there are two common backsets for residential door locks. The backset is the distance from the edge of the door to the center of the 2 1 8 inch bore hole. Standard backsets are either a 2 3 8 backset or 2 3 4 backset.