How do I measure size for mySash Locks?

Hi there, Charles!

We appreciate you reaching out to us. To measure these locks, you want to get the distance between the two installation holes, center-to-center. 2-1/16" and 2-1/4" are the most common sizes.

You also want to measure the "backset" of the holes; or, to put it another way, the distance between the hole centers and the glass-facing edge of the lock.

Our 90-278 looks to be a similar design compared to your original part. This lock measures 2-1/16" on centers and has an 11/16" backset. Take a look at the specifications and see what you think. Note that we do have several other sizes, such as the 90-274, 90-077A, 90-077C, 90-161, and others.

Dimensions for 90-278

It was my pleasure to help, Charles. And thank you for your order! We really appreciate it. Let me know if I can be of further help and best of luck with the repair!