Larson lock

Though the 40-129 is commonly used on Larson doors, we can't guarantee that this is what your door uses. The determining factor would be how the specifications below compare to your thumbturn. If you notice any discrepancies, feel free to get back to us with photos and written-out dimensions of your part uninstalled to confirm if a better replacement is available. Thank you! 

Alternate image for 40-129

Unforutnately, we are not able to make out exact dimensions from photos but the only other thumbturn that we carry would be the 40-089 used with the 40-049 lockset. We can't make any guarantees but review the dimensions below and see what you think.

Exterior view of 40-089

We'd be happy to confirm if we carry a possible replacement for your mortise lock as well but we would need to see photos of the original to compare to our inventory. Please also include written-out dimensions.