Adams Rite 4920AN-55-602-335 Heavy Duty Deadlatch (ANSI Size) with Flat Faceplate in Black Anodized
- Black Anodized Finish
- LH or RHR - 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-55-602-335 from Adams Rite is a Heavy Duty Deadlatch (ANSI Size) with Flat Faceplate in Black Anodized. The 4920AN-55-602-335 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.
Adams Rite 4920AN-55-602-335 Features
- Black Anodized Finish: Provides an attractive, corrosion-resistant surface that enhances durability and withstands various environmental conditions.
- Easily Reversible Handing: LH or RHR operation can be adjusted using just a screwdriver, allowing for versatile installation options.
- Cylinder Backset: 2-3/4" allows compatibility with standard openings, ensuring accurate fit and function.
- Durable Steel Case: With corrosion-resistant plating, measuring 7/8" x 5-13/16", it offers increased resilience and longevity.
- Minimum Door Thickness: 1-3/4" required ensures stability and secure operation in various door types.
- Grade 1 Standard: Meets high commercial quality standards, securing reliability and performance.
- Compatible Cylinder: Uses any standard 1-5/32" mortise cylinder with MS dimensioned cam for ease of replacement.
- Adjustable Armored Faceplate: Measures 1-1/4" x 8" and accommodates right or left beveled edge doors, enhancing versatility.
- Solid Brass Latchbolt: Features a 5/8" x 1" x 5/8" throw for reliable locking action and enhanced security.
- Stainless Steel Auxiliary Latchpin: Prevents unauthorized entry methods, securing the deadlock latch bolt.
- 4506 Strike Included: Designed to facilitate proper installation and operation of the deadlatch.
- ANSI Preparation Strike: The 4506-02 strike is furnished for flat jambs according to ANSI specifications.
Adams Rite 4920AN-55-602-335 Specifications
| Feature | Details |
| Finish | Black Anodized |
| Handing | LH or RHR, easily reversible |
| Cylinder Backset | 2-3/4" |
| Case Dimensions | 7/8" x 5-13/16", depth varies by bracket |
| Minimum Door Thickness | 1-3/4" |
| Grade Standard | Grade 1 |
| Compatible Cylinder | 1-5/32" mortise cylinder with MS cam |
| Faceplate Dimensions | 1-1/4" x 8", adjustable |
| Latchbolt Material | Solid Brass |
| Auxiliary Latchpin Material | Stainless Steel |
| Strike Included | 4506 Strike |
| Strike ANSI Specs | 4506-02 for flat jamb preparation |
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