Do you sell a mortise latch that will fit my Guardian door?

A quick learner from Massachusetts says:
March 18, 2024
Hello, our Guardian patio door handle broke so I purchased a replacement. However I can not find a mortise latch that will fit. The inside opening measures exactly 3 inches yet most commercial mortise latches measure 3 15/16 etc, always a touch bigger than 3 inches. Where can I find a replacement?
Profile picture of Jasmine
Jasmine from SWISCO responded:
March 20, 2024

Thanks for posting! There may be a chance we can supply you with a suitable replacement for the mortise lock you need but I'll need to see a photo of the existing mortise lock to confirm the right replacement. It would also help to see a photo of the space in the door where the mortise lock fits as well as the handle set.

Please let me know if you have any questions in the meantime.
A quick learner from Massachusetts says:
March 21, 2024
Good morning! I can send you a picture of the opening but do not have the actual mortise latch. It was missing since we purchased the home
Profile picture of Jasmine
Jasmine from SWISCO responded:
March 21, 2024

Okay, great! Please send a photo of the opening when you are able.
A quick learner from Massachusetts says:
March 21, 2024
Photos of the opening. It measures exactly 3 inches, no more
Thumbnail of the uploaded file named Mortise Lock Hole Spacing
Thumbnail of the uploaded file named Diecast Patio Keeper
Profile picture of Jasmine
Jasmine from SWISCO responded:
March 21, 2024

Thanks for the photos! I believe the mortise lock you need is the 82-218 Mortise Lock with a round face. When measuring the door to confirm if this will be a fit, you'll want to measure the distance between the installation holes from hole center to hole center. Take a look at the diagram below for reference.

Profile view of 82-218
Profile view of 82-218

For an idea on how to install this in the door, take a look at the video tutorial below.
Mortise Lock, Round Face, 3-11/16"
Mortise Lock, Round Face, 3-11/16"
82-218
$11.70
Diecast Keeper, 7/16" Deep
Diecast Keeper, 7/16" Deep
89-021D
$3.45
Sliding Patio Door Handle Set, 3-15/16"
Sliding Patio Door Handle Set, 3-15/16"
82-030
$29.95
How to install a Legacy Handle Set
How to install a Legacy Handle Set
VIDEO
WATCH >
How to install the 82-218 Mortise Lock
How to install the 82-218 Mortise Lock
VIDEO
WATCH >
How to maintain a sliding glass door
How to maintain a sliding glass door
GUIDE
READ >
How to install the 82-030 Handle Set
How to install the 82-030 Handle Set
GUIDE
READ >
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 3-4 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.