Anti-Twist Washers for Cam Locks

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Anti-Twist Washer for use with Wooden Applications
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Anti-Twist Washer for use with Wooden Applications

Fitting Anti Twist Washers to Cam Locks

We receive a few questions per week about Anti-Twist washers so we thought that it might be helpful to post a guide for buyers.

When you retro-fit a cam lock to any kind of application, the hole is generally already drilled or stamped out, and so it becomes a very easy job just to take the clip or nut off the back of the old cam lock, withdraw it from the hole, and replace it with a new cam lock, job done.

When you removed a cam lock and before replacing it with a new one on a metal door, you'll probably notice that the hole is not entirely circular.  It has two straight edges generally running vertically down each side.

This in effect stops the cam lock from turning whilst in situ, these 'straight edges' also stop anybody turning the cam lock body whilst it is in the locked position and opening up the locker door without the use of a key.

When you fit a cam lock to a new application, typically wood or MDF construction, you have no option but to drill a circular hole.  The problem then occurs that without an 'Anti-Twist' washer the lock can be turned with the use of a straight bladed screwdriver or a pair of pliers.

To stop this happening you fit an anti twist washer which has small spikes on its surface.  These 'bite' into the wooden surface as the nut is tightened on the back of the cam lock.

This then secures the cam lock and it cant be moved so easily as explained above.

We also have repair washers for cam locks for use where a hole has been drilled too large, or where there has been damage previously to the hole.  You can find information on these in a separate post.

As always if you have question on these then do contact us.


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