How to Lock a File Cabinet

How To Lock A Filing Cabinet

Our number one request in small lock solutions is for filing cabinet locks.

There are a few possible situations, and a locksmith can help you with all of them. When you need to lock a filing cabinet, you might: just need a filing cabinet key, want to replace a missing lock, or are looking to add a lock to the filing cabinet. Depending on the application, you can lock a filing cabinet with: cam locks, filing cabinet locking bars, hasps, plunger locks and dead latch locks.

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Making a Key to a File Cabinet Lock

Keys Made by Code for Filing Cabinet
If your filing cabinet has lock, but you don’t have the key your local locksmith can usually make keys for filing cabinets in their shop or at your site. This is very affordable and can be as little as $20 to cut a key for the cabinet by code (using the numbers that are on the lock).

Or, if the code isn’t in your locksmith’s system, a locksmith can hand-file a key to work the lock. This technique is called ‘impressioning’, and usually costs a bit more than cutting a key by code.

In some cases (such as a single lock needing to have a key made), it may be cheaper to simply replace the lock. But it really depends on the lock. When there are several or more cylinders that operate off the same key code, impressioning a file cabinet key or cutting a key by code is the way to go.


To save even more money, when the cabinet is not locked, you can remove the file cabinet lock and bring it to your local locksmith shop.

When a local locksmith goes to your site there is a ‘trip fee’ charged to cover that cost. But, when you bring the lock to a locksmith shop, you won’t need to pay that and will save a significant amount of money.

If you can’t figure out how to remove a lock from a file cabinet, see if there is a manufacturer listed on the file cabinet, and search online – there is probably a video or article showing you how to remove the lock.

Can My File Cabinet Locks Be Rekeyed?

We’re often asked if we can rekey file cabinet locks. In most cases, we cannot.

Most cam style locks are riveted together and not designed to come apart, and service kits (either pins are wafers) are not available.

There are a few instances where cam locks are rekeyable, however. If your locksmith has a pinning kit for the style locks, they may be able to. But even when that is the case, it’s typically less to just replace it if it’s a standard cam lock.




How To Replace A Filing Cabinet Lock?

Replacing File Cabinet Lock with a Cam Lock
If the locks are simply missing, a locksmith can usually use a standard cam lock as a replacement.

If a standard cam lock doesn’t work though, replacing the file cabinet lock might not be worth it. Especially if it is a very inexpensive file cabinet. The cost of researching the part, the part, and the labor to install the part will exceed the cost of a cheap file cabinet.

But for older filing cabinets, well-built ones, fire-rated filing cabinets or otherwise high-end file cabinets; getting a lock for the existing cabinet is the best to go. Your local locksmith will be able to order and/or install the lock you need.

Depending on the lock and the age of the file cabinet, there may be other options to lock the filing cabinet that are less expensive and offer more security.

Locking A Filing Cabinet That Doesn’t Have A Lock

Filing Cabinet Locking Bars

For retro-fitting file cabinets with no locks, there are a number of products to solve this need.

ACME Locksmith Installation of Locking Bars – Product Available on Amazon
One of my favorites is to use file cabinet bars, particularly the (ABUS File Cabinet Locking Bars available on Amazon).

These are bars that are mounted on the outside of metal filing cabinets, and are secured with a padlock. They come in different and specific sizes for 1-5 drawer cabinets, and they lock all cabinet drawers at once.

They are fairly easy to install for the do-it-yourselfer, but if needed, don’t hesitate to contact your local locksmith to install the file cabinet locking bar. Regardless of what was on the filing cabinet at one point (if a lock previously existed) filing cabinet locking bars offer the best security across the whole cabinet.

Locksmith Tip for File Cabinet Bars: If you want, you can use a padlock that can be keyed up to your home our business key. ABUS makes one of our favorite (the ABUS 83/45 series available on Amazon). Just be sure to order the ABUS 83/45 series padlock that is the same keyway as your home or business key. Once you have the padlock, take it into a locksmith shop to get it keyed to match you existing key.

Cam Locks May be Used on Individual Drawers

Installing Filing Cabinet Locks On Individual Drawers

If you want to secure each drawer separately, then you can sometimes fit cam locks into the drawer faces, which latch against the drawer frame materials, if the space inside allows for it.

Alternately a small piece to catch the cam arm can be put in. Cam locks are usually very inexpensive, and can be ordered to be keyed alike to or differently from each other, depending on need.

There are also cam styles that use combinations instead of keys, if you’d rather not have to use a key that might get lost. The face of these locks is a little bigger than a standard cam lock, but many people find them more convenient.


Other Ways To Secure File Cabinets

Hasps, like this one from Amazon, can be used to lock filing cabinets.
You can use a hasp between the drawer and frame to lock the file cabinet drawer.

A hasp attaches to the side of a file cabinet, and a piece of this folds over the drawer, to be secured using a padlock.

This usually isn’t the ideal set-up (they aren’t very visually appealing), but in some situations it can be the best (or only) way to secure them.

There are some plunger style locks available that may allow a retro-fitted cabinet to self-latch and lock upon closing, but some file cabinets may not accommodate them. These would also in this case be installed on the side of the file cabinet instead of the face, and depending on where the file cabinet is to be seated, it may not be ideal.

I’m Retro-Fitting My File Cabinet With Locks. Where Do I Install Them?

It is preferable, when possible, to install cam locks into a space that has some thickness of material to it. Very thin metal will be strained if someone tries to open the cabinet without unlocking it, and it may bend.

If the drawers have an area with more than one layer of metal used for the cam lock, it will hold up better if installed there. If your cabinets are made poorly, it may actually be cheaper to just buy a new cheap file cabinet that comes with locks, rather than the installation time and expense to retro-fit.


Installing a Lock on a Wood File Cabinet.

Wood file cabinets may also utilize a cam lock in many cases, but if they are real wood, you are open to some other options, such as flush mount locks and locks which would automatically be secured each time the drawer closed (called a ‘dead latch’, similar to the self-latching door lock on your home).

Olympus Deadbolt Locks
Olympus locks are great for wood filing cabinets and when installed correctly can be very secure (they are available on Amazon).

In a lot of antique situations, there may be pre-cut spaces for locks which are simply missing. But chances are that there’s an aftermarket lock that can fit the function and space, if you can gather the precise measurements to the existing spaces missing the locks.




If you’re doing a retro-fitting, a real wood cabinet product gives you the most options for securing them in a manner that is attractive and functional. Though you may pay more for the hardware and put a little more work into the fitting of the new locks, it’s worth it to have a more robust lock installed.


A final note about retrofitting locks into cabinets with particle board doors here. Particle board is made of little bits of wood that are (essentially) glued together into a flat board.

Usually, cabinets constructed of this material are not of the best quality. Drilling into particle board creates significant weak spots in the material, and they may break or ‘shed’ wood particles shortly after installing locks.

We don’t recommend installing locks into a particle board filing cabinet. It’s just not worth it. If you have a cabinet made of pressed wood, consider buying a different one, or consider storing your valuables elsewhere.





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