Printable Baldwin entry mortise lock replacement and order guide for models 6320, 6020, 6301 and 6001

Baldwin Entry Mortise Lock Replacement Guide (6320, 6020, 6301, 6001)

Print the Baldwin Entry Mortise Lock Order Guide (PDF)

Use this guide to identify a Baldwin exterior (entrance) mortise lock and build the correct order number before replacing the lock body. It covers the standard entry models in both backsets, how the lock functions, door thickness, finish, and handing.

Baldwin Entry Mortise Lock Models

  • 2-1/2" backset: 6320, 6320LS, 6301, 6301LS
  • 2-3/4" backset: 6020, 6020LS, 6001, 6001LS

How the Lock Works

The deadbolt locks with a key from the outside and a thumb turn from the inside. Toggle buttons on the lock edge can keep the outside handle locked. Models 6310 and 6010 do not have the toggle.

How to Order a Replacement Baldwin Mortise Lock

  1. Backset: confirm 2-1/2" or 2-3/4" by matching your old lock model, or measure from the edge of the door to the center of the handle.
  2. Door thickness: 1-3/4" or 2-1/4".
  3. Finish: choose the finish and note its Baldwin finish code.
  4. Handing: use the Door Handing Chart.
  5. Write the order number: Baldwin [Model].[Finish Code].[Handing Code].

Shop Baldwin Entry Mortise Locks

Extended lip strikes: Baldwin 6339 for the 6320 and Baldwin 6039 for the 6020. Need a new key cylinder only? Use the Mortise Cylinder Sizing Guide.

Not sure what you have? Send Classic Door clear photos of the lock faceplate on the door edge and both handles before ordering.

Mortise Lock Replacement Questions

How do I replace an old mortise lock?

Remove the inside and outside handles, slide out the spindle, loosen the cylinder set screw on the door edge and unscrew the cylinder, then remove the two faceplate screws and pull the lock body out. Install the new lock body the same way in reverse.

Are all mortise locks interchangeable?

No. The new lock body must match the old one's backset, size, faceplate, and function, and be the right hand. Matching the model number is the easiest way to be sure it fits the existing hole and trim.

Should I repair or replace my mortise lock?

Often only the key cylinder or a part needs replacing. If the key will not turn, start with the mortise cylinder. If the latch, deadbolt, or handle no longer works, replace the lock body.

What is the difference between a mortise lock and a tubular lock?

A mortise lock is a rectangular box set into a pocket in the door edge, with a tall faceplate. A tubular lock fits in a round hole bored through the door and has a small latch. They are not interchangeable without changing the door.

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