40-096 Length on Tube?

A quick learner from massachusetts says:
How long is the tube holding the striker? I only have 1.75 inches for the tube. Most are now 2.75 inches or so. Too big for this 60 year old screen door.
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Dave Sr. from SWISCO responded:
The mortise tube is 2-1/2" long. With the spring latch installed, it measures 2-3/4" from the nose of the latch to the end of the tube. The back set is 1-3/4", which would be from the edge of the door to the middle of the knob spindle. Let me know if these measurements help.
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