Chicago Lock LL300 to LL399 Replacement Key | USA & Canada

LL300 to LL399 Chicago Lock Replacement Key

Chicago Lock LL300 to LL399 Replacement Key | USA & Canada

  • Scroll down and read ALL Technical Notes BEFORE placing order.

Regular price $5.75
  • This price is for orders placed online only. Pricing for telephone or walk in orders at our retail store are significantly higher. Please place your order online to save money.
  • Free Canada and USA shipping on orders over $100 Est.1965. Fast shipping: USA, Canada & Worldwide

Usually ships the same business day

***Read Warning in Technical Notes below***

Chicago Lock LL300 to LL399 series easy replacement keys for Office Furniture, File Cabinets, Desks, Drawers, Cubicles.

We also ship Chicago Lock lock cores, housings & parts.

When you have lost or are missing the key we make easy replacement key copies by the code number stamped on the original key or on the face of the lock.

We stamp our replacement keys with that code number for easy identification.

We make keys for all major manufacturers.

We have a vast inventory of hard to find key cylinders, cores, lock housings, complete locks & parts for all major office furniture desk file cabinet and cubicle manufacturers including obsolete and legacy parts.

 ***Please choose your key number from the drop down list above***


Technical Notes:

Warning: Nothing is simple

There are 2 different common code series for LL226 to LL425, one manufactured by Chicago lock & one by Hudson Lock.

On THIS page you are ordering keys typically used on electrical equipment, tool boxes etc. with locks manufactured by the Chicago Lock Company used on various manufacturers of Office Furniture & related products such as Cole Steel, Invincible, Compatico, Metal Arc, MMF Key Cabinets, etc.

This was a common key series for older tool boxes from Beach, Canadian Tire, Eatons, Huskey, Mac, Proto, Sears Craftsman, Stanley, etc

If the key you require is for wooden Herman Miller office furniture you most likely need the Hudson Lock key that can be ordered at the link below

Herman Miller LL300 to LL399 Replacement Key | USA & Canada – Acme Lock & Key Toronto

If your not sure email us a clear close up picture of your lock to BEFORE you order and we will review and email you back the correct link to order from.

Technical Info by:

John Rowland, CML.
Certified Master Locksmith
Associated Locksmiths of America
ALOA Security Professionals Association Inc.

Below info courtesy of Roy Long on Long Life's Website 

 chicago locks (

There are no refunds or returns on office furniture keys, this keeps our prices low

If your key goes into the lock but did not work please check the following:

Did you order the correct key, the numbers stamped on the lock can be hard to read, use a magnifying glass or take a picture with your cell phone and zoom in.

Sometimes the number on the lock is wrong or the lock has been rekeyed, you will require onsite service to repair or a new lock is required

If the key goes in and turns but the furniture does not lock then there is a problem with the locking mechanism

If the key won't go in check and see if there is a broken key inside the lock, if so it will have to be removed or you will need a new lock

Keys in this series:

LL300 LL301 LL302 LL303 LL304 LL305 LL306 LL307 LL308 LL309 LL310 LL311 LL312 LL313 LL314 LL315 LL316 LL317 LL318 LL319 LL320 LL321 LL322 LL323 LL324 LL325 LL326 LL327 LL328 LL329 LL330 LL331 LL332 LL333 LL334 LL335 LL336 LL337 LL338 LL339 LL340 LL341 LL342 LL343 LL344 LL345 LL346 LL347 LL348 LL349 LL350 LL351 LL352 LL353 LL354 LL355 LL356 LL357 LL358 LL359 LL360 LL361 LL362 LL363 LL364 LL365 LL366 LL367 LL368 LL369 LL370 LL371 LL372 LL373 LL374 LL375 LL376 LL377 LL378 LL379 LL380 LL381 LL382 LL383 LL384 LL385 LL386 LL387 LL388 LL389 LL390 LL391 LL392 LL393 LL394 LL395 LL396 LL397 LL398 LL399


-10 small office furniture keys or 5 full size keys can ship by Canada Post regular non tracked mail for $4.95
-Other orders ship by Canada Post shipping of your choice at checkout at actual Canada Post cost

Other orders ship by Canada Post shipping of your choice at checkout at actual Canada Post cost