Keyed Lever Deadbolt Latch Set, 3 inch Screw Centers 1-1/2" Backset - Satin Chrome   
The original manufacturer does not provide a warranty on hardware. ( out of business)   

Application: Primarily sun rooms and four Season Enclosures with aluminum doors   
Hardware Type: Surface mount with tubular latches   
Backset: 1-1/2 inch   
Door Thickness: 1-5/8" mostly, Varies by Manufacture   

Replacement Option 1: 
If Spring Latch is broken, Replace with  303016  Spring latch  with  524624 adapter
  * The adapter fits inside the hub of the replacement latch

Replacement Option 2:   
P2000-35SPL, Single Point lock or Hoppe 35/92 Single Point Lock 1-3/8" Backset & New Handle Set ( several options) & flat Strike Plate  
( Lock Case Depth: 2 inch, 2-1/8 from faceplate )   
The P2000 option is the most expensive, and requires more modifications but it provides the best results.   
New 2025 - Hoppe # 11880259 has 7/8" wide faceplate on their 1-3/8" backset lock with 1" throw deadbolt   
* Note this requires modifications to the door. Contact Rory for more information and details.   
   

ADDITIONAL INFORMATION ON ORIGINAL LOCK SET   
The most common point of failure is the latch mechanism.   
Mortise storm door handle hardware kit with 1-1/2 inch back set in satin chrome.   
This kit includes combination spring latch with deadbolt.   
Lever Projection, Inside: 1-3/8 inch from surface to inside   
Lever Projection, Outside: 1-1/2 inch from surface to inside   
Door Thickness: 1-5/8 Inch   
Exterior Faceplate Length: 3 Inch   
Exterior Faceplate Width: 1-3/8 Inch   
Interior Faceplate Length: 5-3/4 Inch   
Interior Faceplate Width: 1-13/16 Inch   
Interior Handle PZ: 3 Inch   
Interior Handle Screw Hole Center: 4-3/4 Inch (4 Holes at 1-3/4 Inch)   
Key Housing Length: 2-1/2 Inch   
Key Housing Width: 1-3/8 Inch   
Keying: Rekeyable American Cylinder Dexter - Kwikset   
Deadbolt Backset: 1-1/2 Inch   
Spring Latch Backset: 1-1/2 Inch   
Spindle Type: Square   
Spindle Diameter: 1/4 Inch   
Spindle Length: 5-1/16 Inch   
Finishes: Satin Chrome only, Polished Brass discontinued.   
Contents: 1 Inside Handle, 1 Outside Handle, 1 Lock Cylinder, 2 Keys, 1 Deadbolt, 1 Spring Latch, 1 Spindle, 12 Screws, 2 Keys