HERMAN MILLER UM226 - UM427 [CHROME] LOCK CORES & KEYS

NOTE: The Herman Miller UM226 - UM427 lock cores are different than the CompX Timberline UM226 - UM427 lock cores. The Herman Miller and CompX Timberline cores have different housings and have a different configuration on the back of the core - they also require different control keys to remove and install them. If you are unsure as to which core you need, please contact Customer Service for assistance.

If not in stock, it usually takes 25 days to get more.
ETA to EasyKeys: 12/29/2025