Master Lock Commercial Mortise Locks

Commercial electronic mortise locks

Choose the right Master Lock MCM mortise lock

The MCM614, MCM624, MCM634 and MCM644 families share a professional commercial mortise platform, but differ in the two decisions buyers notice most: push-button versus touchscreen and keyed override versus key-free operation. Use this guide to select the correct family before choosing connectivity and deadbolt options.

Shop by lock family Compare all four models

Make these four decisions first

Selecting the correct MCM lock is straightforward when the requirements are resolved in this order.

Push-button or touchscreen?

Choose push-button for tactile feedback and straightforward operation. Choose touchscreen for a cleaner, more contemporary interface.

Keyed override or key-free?

Keyed models retain a mechanical override path. Key-free models remove the exterior key cylinder for a cleaner appearance and tighter credential control.

Stand-alone or Z-Wave Plus?

Stand-alone models are programmed and managed locally. Z-Wave Plus models are intended for integration with a compatible partner platform; confirm system compatibility before ordering.

Deadbolt or latch-only?

Select the deadbolt configuration when the opening and project specification require an additional 1-inch deadbolt. Confirm door preparation before purchase.

Shop the four Master Lock MCM families

Start with the interface and override architecture below. Connectivity and deadbolt choices are selected within the individual product family.

MCM614

Push-button keypad with keyed override

A tactile push-button interface combined with a mechanical key-override provision.

Best for: commercial openings that prioritize tactile operation while retaining an emergency or facilities key path.

Shop MCM614
MCM624

Touchscreen keypad with keyed override

A modern touchscreen interface with a mechanical key-override provision.

Best for: projects that want a premium touchscreen experience without eliminating the facilities key path.

Shop MCM624
MCM634

Push-button keypad, key-free

A tactile push-button interface without an exterior mechanical key override.

Best for: credential-controlled openings where buyers want tactile buttons and no exterior key cylinder.

Shop MCM634
MCM644

Touchscreen keypad, key-free

A clean touchscreen interface without an exterior mechanical key override.

Best for: modern credential-controlled projects seeking the cleanest exterior appearance in the MCM lineup.

Shop MCM644

MCM614 vs. MCM624 vs. MCM634 vs. MCM644

Use this table when the project team needs a fast family-level comparison.

Decision MCM614 MCM624 MCM634 MCM644
User interface Push-button keypad Touchscreen keypad Push-button keypad Touchscreen keypad
Mechanical key override Yes Yes No No
Best match Tactile controls plus key override Touchscreen plus key override Tactile controls with a key-free exterior Touchscreen with a key-free exterior
Configuration choices Stand-alone or Z-Wave Plus; with or without deadbolt Stand-alone or Z-Wave Plus; with or without deadbolt Stand-alone or Z-Wave Plus; with or without deadbolt Stand-alone or Z-Wave Plus; with or without deadbolt
View family View MCM614 View MCM624 View MCM634 View MCM644

Confirm these project details before ordering

Commercial lock ordering is configuration-sensitive. Confirm the complete opening and access-control requirements rather than selecting only by keypad style.
  • Keyed or key-freeChoose whether facilities require a mechanical override path.
  • ConnectivityChoose stand-alone or Z-Wave Plus and verify the connected platform.
  • Deadbolt requirementConfirm whether the opening requires the optional 1-inch deadbolt configuration.
  • Cylinder and coreKeyed SFIC-prepped models are generally supplied less core unless the product states otherwise.
  • Door preparationVerify door thickness, backset, handing, strike and existing mortise preparation.
  • Lever and finishConfirm the approved lever design and architectural finish for the project.
  • Code capacity and workflowThe MCM platform supports up to 500 access codes; confirm the programming and management workflow required.
  • Listings and environmentMatch the exact SKU to the project's Grade, fire, windstorm and environmental requirements.

Master Lock MCM buying questions

Which model should I choose when a key override is mandatory?
Choose MCM614 for a push-button keypad or MCM624 for a touchscreen. Both families retain a mechanical key-override provision.
Which model has no exterior key cylinder?
Choose MCM634 for push-button operation or MCM644 for touchscreen operation. These are the key-free families.
Do Z-Wave Plus models work by themselves?
The lock can provide local lock functionality, but connected management requires a compatible Z-Wave partner platform. Confirm interoperability and required modules before ordering.
Does every model include a deadbolt?
No. Deadbolt and non-deadbolt configurations are separate selections. Confirm the door preparation and project specification before choosing.
Are keyed models supplied with a cylinder core?
Keyed SFIC-prepped configurations are typically supplied less core unless the individual product listing specifically states otherwise.
Can I choose by appearance alone?
No. Interface style is only the first decision. The correct order also depends on override requirements, connectivity, deadbolt, cylinder/core, door preparation, handing, lever and finish.

Start with the family that matches the opening

Select the keypad and override architecture first, then choose the stand-alone or Z-Wave Plus and deadbolt configuration on the product page.

MCM614 MCM624 MCM634 MCM644