Herman Miller UM300 to UM399 Replacement Key | AcmeKey.ca USA & Canada

Herman Miller UM300 to UM399 Replacement Key | AcmeKey.ca USA & Canada

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

Regular price $2.99
  • 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

AcmeKey.ca Est.1965. Fast shipping: USA, Canada & Worldwide

Usually ships the same business day

Herman Miller Geiger UM300 to UM399 series easy replacement keys for Office Furniture, File Cabinets, Desks, Drawers, Cubicles.

We also ship Herman Miller 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


Herman Miller Info

Herman Miller Locks (longlifelocks.ca)

 herman miller locks - YouTube


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:

UM300 UM301 UM302 UM303 UM304 UM305 UM306 UM307 UM308 UM309 UM310 UM311 UM312 UM313 UM314 UM315 UM316 UM317 UM318 UM319 UM320 UM321 UM322 UM323 UM324 UM325 UM326 UM327 UM328 UM329 UM330 UM331 UM332 UM333 UM334 UM335 UM336 UM337 UM338 UM339 UM340 UM341 UM342 UM343 UM344 UM345 UM346 UM347 UM348 UM349 UM350 UM351 UM352 UM353 UM354 UM355 UM356 UM357 UM358 UM359 UM360 UM361 UM362 UM363 UM364 UM365 UM366 UM367 UM368 UM369 UM370 UM371 UM372 UM373 UM374 UM375 UM376 UM377 UM378 UM379 UM380 UM381 UM382 UM383 UM384 UM385 UM386 UM387 UM388 UM389 UM390 UM391 UM392 UM393 UM394 UM395 UM396 UM397 UM398 UM399


-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