Adams Rite 4920AN-56-000-335 Heavy Duty Deadlatch (ANSI Size) with Flat Faceplate in Black Anodized
- Black Anodized Finish
- RH or LHR - handed operation is easily reversible using only a screwdriver
- Cylinder Backset: 2-3/4"
- Case is made of steel with corrosion-resistant plating that measures 7/8" x 5-13/16" x depth (depth varies by bracket)
- 1-3/4" minimum door thickness required

The 4920AN-56-000-335 from Adams Rite is a Heavy Duty Deadlatch (ANSI Size) with Flat Faceplate in Black Anodized. The 4920AN-56-000-335 series Deadlatch offers precise traffic control and easy installation for wood or hollow metal doors prepared for hardware according to the specifications of the American National Standards Institute (ANSI). A key-controlled bolt hold-back feature allows a door to free-swing part of the day and exit-only when the bolt is free to latch. This allows a "locked" entrance to be used as an exit by customers or visitors already in the building. For its operation turn key or operate handle to retract spring-loaded latchbolt. To hold bolt retracted, push it in and secure by reverse turn of key. It is easily interchangeable, without stile modification with any MS1850A or MS1850S Deadlock of same backset and faceplate shape. It also replaces 4520 and 4720 ANSI Deadlatches.
Features
- Black Anodized Finish: Durable coating that enhances appearance while offering corrosion resistance.
- RH or LHR Reversible Operation: Easily adaptable for both right-hand or left-hand installation using only a screwdriver, providing versatility.
- Cylinder Backset: 2-3/4"; compatible with various standard door preparations, ensuring easy installation.
- Steel Construction: Robust case made of steel with corrosion-resistant plating, ensuring longevity and reliability.
- Minimum Door Thickness: 1-3/4" required for proper fit and functionality, catering to standard door sizes.
- Grade 1 Standard: Designed for high traffic and heavy-duty use, meeting rigorous safety and durability standards.
- Mortise Cylinder Compatibility: Uses any standard 1-5/32" mortise cylinder with MS dimensioned cam, providing flexibility in locking mechanism.
- Armored Flat Faceplate: Measures 1-1/4" x 8", adjustable for right or left beveled edge doors, enhancing adaptability.
- Solid Brass Latchbolt: Features a throw of 5/8" x 1" x 5/8", delivering secure and reliable performance.
- Stainless Steel Auxiliary Latchpin: Protects against unauthorized entry methods, adding an extra layer of security.
- Less Strike Included: Simplifies installation processes, making it easier to get started.
- ANSI Strike Furnished: The included 4506-02 strike is designed for flat jambs, ensuring compliance with ANSI specifications.
Adams Rite 4920AN-56-000-335 Detailed Specifications
| Feature | Detail |
| Finish | Black Anodized |
| Operation | RH or LHR, reversible with screwdriver |
| Cylinder Backset | 2-3/4" |
| Case Material | Steel with corrosion-resistant plating |
| Dimensions | 7/8" x 5-13/16" (depth varies by bracket) |
| Minimum Door Thickness | 1-3/4" |
| Standard | Grade 1 |
| Mortise Cylinder | 1-5/32" with MS dimensioned cam |
| Faceplate Dimensions | 1-1/4" x 8", adjustable for beveled doors |
| Latchbolt Material | Solid brass |
| Latchbolt Throw | 5/8" x 1" x 5/8" |
| Auxiliary Latchpin | All stainless steel |
| Strike Included | Less strike included |
| Strike Type | 4506-02, ANSI preparation specifications |
Tools & Calculators


