CompX Timberline Lock Core for UM289 with 2 Keys

The CompX Timberline UM226–UM427 Black Finish Lock Cores are genuine, factory-compatible replacement lock cores designed for CompX Timberline office furniture locking systems, including desks, filing cabinets, storage pedestals, credenzas, and modular workstations. These lock cores are precision-keyed to the UM-series key range (UM226 through UM427) and manufactured to deliver a precise fit, smooth operation, and long-term reliability.

Featuring a durable black finish, these lock cores are ideal for matching existing CompX Timberline black hardware while maintaining a clean, uniform appearance across office furniture installations. Each lock core installs into compatible Timberline lock housings and is designed to be removed and installed using the proper CompX Timberline control key.

Important Compatibility Note: CompX Timberline UM226–UM427 lock cores are not interchangeable with Herman Miller UM226–UM427 lock cores. Although the lock code range is similar, the core housings, internal mechanisms, and control-key systems are different. Always confirm the furniture manufacturer before ordering.