SWISCO - The Replacement Hardware Authority

Mortise lock for Legacy handle set

A quick learner from Salisbury, MD says:
I purchased an 82-075 Legacy Keyed Handle Set, 3-15/16" (1-5/8" Door) for my door. It fits perfectly. For the mortise lock I purchased 82-218. This does not fit in the opening in my door which is 3" tall by 1/2" wide. What mortise lock can I use with this handle set that will fit my opening?
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Tom from SWISCO responded:
Do you have your old mortise lock handy? If so, I'd like to see it. The 82-075 can work with a number of mortise locks and I'd like to narrow down the list of possibilities. I would also like to know the distance between installation holes. Thanks!
A quick learner from Salisbury, MD says:
Here are some pictures. 3 5/8 is the distance between the screws, overall measurement is 3 1/8 x 1/2
User submitted photos of patio door hardware.
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Tom from SWISCO responded:
That is weird. The 82-218 seems like a perfect fit for you. The dimensions aren't exact, but we don't have anything else closer. Do you have your old mortise lock handy at all? When you say the 82-218 doesn't fit in the opening, can you be more specific? What dimension isn't working?
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