Graphical Construction Glossary >> Doors. >> Door Hardware >> Deadbolt

A type of door lock, the main operating part of which is rectangular in section. It is activated by key, lever, knob or by electronic switch. AKA Dead Bolt
Tubular Bolt
A small, cheap type of dead lock.

A thumbturn dead lock
A Mortise Thumb turn and Cylinder Dead bolt Lock
Image provided by Hafele Australia Pty. Ltd.

In the strict sense that locksmiths use the term dead bolt means the actual bolt part of the mechanism itself. However it is common for someone to say "get some deadbolts fitted mate!" after a break in.
In fact that is the main reason that they are used. It is when the main door lock is not considered secure enough.

So what you see above is usually the type of lock that is called a dead bolt. That means that on the outside of the lock there is a cylinder and on the inside there is what is known as a thumb turn. The diagram shows it.

Two Dead locks on the one door
Deadbolt : Two Dead Locks on the one door

Here is an image that you may have seen before but I include it here in case you have landed on this page straight from a search engine.

It is from my door locks introduction page so if you have not seen it then go there to pick up the terminology the the letters are referring to. The top lock is a rim lock with a dead bolt and a latch combined. The bolt is marked "C".
Below it is a Night latch style Rim fixed Dead Bolt Lock. The dead bolt is marked "G" and the Thumb turn is marked "F".

A Double Keyed Dead Bolt Lock
Deadbolt : A Double Keyed Dead Bolt Lock
Image provided by Hafele Australia Pty. Ltd.

This is another mortice style tubular lock similar to the top one. This one has a cylinder on each side. Once again there is a slight repetition here as I have already mentioned this type of lock elsewhere. For a section about the safety aspects of this lock go to the deadlock page.

A tubular Bolt
Deadbolt : A tubular Bolt
Image provided by Hafele Australia Pty. Ltd.

A small budget priced lock that is quite common and it is very easy to fix.

So once again the term Dead Bolt is just about interchangeable with the term Dead Lock, both of them can be spelt with one word or two and both of them can refer to expensive upper end mortise locks, and medium to cheap tubular style mortise locks and to medium to cheap Rim Locks. There is no doubt that the English language is a confusing beast and it is this reason that I try to include diagrams or photographs as I get confused myself, never mind my visitors who are using English as a second language.

If you didn't find exactly what you are looking for try this search tool that will search the site and the web.

"What can be added to the happiness of a man who is in health, out of debt, and has a clear conscience?
Adam Smith 1723-1790

"When we build, let us think that we build for ever."John Ruskin 1819-1900

coates hire
Hire Equipment
Furniture Fittings - Architectural Hardware - Electronic Locking Systems - Technical Hardware
BuilderBill sponsorship

BuilderBill Books

building maths
Building Maths

Stair Design
asbestos ebook
Asbestos Book

Calculator Pages.

Concrete yardage calculator

Reader's Questions.

Questions and answers.



Please Note! The information on this site is offered as a guide only!  When we are talking about areas where building regulations or safety regulations could exist,the information here could be wrong for your area.  It could be out of date!  Regulations breed faster than rabbits!
You must check your own local conditions.
Copyright © Bill Bradley 2007-2012. All rights reserved.
Page copy protected against web site content infringement by Copyscape