Allsteel MG300 to MG399 Office Furniture Replacement Key |

MG300 to MG399 Allsteel Replacement Key

Allsteel MG300 to MG399 Office Furniture Replacement Key |

  • 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

Allsteel MG300 to MG399 series easy replacement keys for Office Furniture, File Cabinets, Desks, Drawers, Cubicles.

We also ship Allsteel 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 Info:

Pictures and info courtesy of Roy Long

Click on the business card below for vast office furniture service info.



For quick how to videos visit Roy’s YouTube channel Mr. File Cab

 Allsteel 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:

MG300 MG301 MG302 MG303 MG304 MG305 MG306 MG307 MG308 MG309 MG310 MG311 MG312 MG313 MG314 MG315 MG316 MG317 MG318 MG319 MG320 MG321 MG322 MG323 MG324 MG325 MG326 MG327 MG328 MG329 MG330 MG331 MG332 MG333 MG334 MG335 MG336 MG337 MG338 MG339 MG340 MG341 MG342 MG343 MG344 MG345 MG346 MG347 MG348 MG349 MG350 MG351 MG352 MG353 MG354 MG355 MG356 MG357 MG358 MG359 MG360 MG361 MG362 MG363 MG364 MG365 MG366 MG367 MG368 MG369 MG370 MG371 MG372 MG373 MG374 MG375 MG376 MG377 MG378 MG379 MG380 MG381 MG382 MG383 MG384 MG385 MG386 MG387 MG388 MG389 MG390 MG391 MG392 MG393 MG394 MG395 MG396 MG397 MG398 MG399


-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