Small part that the patio door spindle inserts into

Hello,

It looks like you are showing a thumb latch from one of our videos, which may be the 82-106. With that being said, we would need to see photos of your original handle set and mortise lock in the center of the door to confirm if this part would work for your application. Thank you! 

82-106 in the white color option

Alternate view of 82-106