Provide durable commercial traffic control with the Adams Rite 4900 Series Heavy Duty Deadlatch.

Designed for narrow-stile aluminum doors, the 4900 combines a heavy-duty solid-brass latchbolt, stainless-steel auxiliary deadlatch, and key-controlled latch holdback to provide flexible operation throughout the business day.

The 4900 is also an excellent retrofit option for compatible existing Adams Rite MS1850S Deadlock, 4510 Deadlatch, and discontinued 4700 Deadlatch preparations when the new lock uses the same backset.

Key Features

• Genuine Adams Rite / ASSA ABLOY

• 4900 Series Heavy Duty Deadlatch

• Designed for aluminum-stile commercial doors

• Heavy-duty solid-brass latchbolt

• 5/8" latchbolt throw

• Stainless-steel auxiliary deadlatch

• Helps resist carding and loiding

• Built-in key-controlled latch holdback

• Field-reversible handing

• No special tools required for rehanding

• Available backsets:

  • 31/32"

  • 1-1/8"

  • 1-1/2"

• Fits standard Adams Rite MS® Prep

• Retrofits compatible existing MS1850S preparations

• Retrofits compatible 4510 and discontinued 4700 preparations

• Accepts standard mortise cylinder with MS® cam

• Compatible with Adams Rite handles and paddles

• Compatible with select Adams Rite electric strikes

• Flat and radius faceplates supplied

• 4902 strike standard

• Available in Clear Aluminum, Dark Bronze, or Black finishes

Heavy-Duty Commercial Traffic Control

The 4900 provides flexible operation for commercial entrances that require:

• Free entry during business hours

• Controlled entry after hours

• Exit-only traffic

• Key-controlled access

• Mechanical interior egress

The spring-loaded latchbolt automatically engages the strike when the door closes.

A compatible handle, paddle, key, or other operating trim retracts the latchbolt when access is required.

5/8" Solid-Brass Latchbolt

The 4900 uses a heavy-duty:

Solid Brass Latchbolt

Latchbolt Dimensions

Width: 5/8"
Length: 1"
Throw: 5/8"

The larger latchbolt distinguishes the heavy-duty 4900 from lighter standard-duty deadlatch designs.

Stainless-Steel Auxiliary Deadlatch

The auxiliary deadlatch pin is constructed from stainless steel.

When the door is properly closed against the strike, the auxiliary pin deadlocks the main latchbolt to help prevent it from being manipulated with:

• Credit cards

• Knives

• Thin tools

• Similar forced-entry techniques

This type of attack is commonly called loiding or case-knife entry.

Key-Controlled Latch Holdback

The 4900 includes a built-in holdback feature.

To hold the latchbolt retracted:

1. Fully retract the latchbolt.

2. Hold it in the retracted position.

3. Reverse-turn the key.

The latch remains retracted, allowing the door to operate:

Free Swinging

This is ideal when unrestricted two-way traffic is desired during normal business hours.

Releasing the holdback restores normal spring-latch operation.

Backset Options

Available backsets include:

• 31/32"

• 1-1/8"

• 1-1/2"

Always verify the existing door preparation before ordering.

When replacing another Adams Rite lock, the replacement 4900 should match the existing backset.

MS® Prep Retrofit

One of the major advantages of the 4900 is compatibility with Adams Rite's established MS® door preparation.

The 4900 can be interchanged without stile modification with a compatible:

• MS1850S Deadlock

when the:

• Backset matches

• Faceplate configuration matches

The 4900 can also retrofit compatible preparations for:

• 4510 Standard Duty Deadlatch

• 4700 Series Deadlatch – Discontinued

This makes the 4900 especially useful for storefront door repair and upgrades.

Mortise Cylinder Compatibility

The 4900 accepts a standard:

1" Long x 1-5/32" Diameter Mortise Cylinder

with an:

Adams Rite MS® Cam

Compatible examples include:

• Adams Rite 4036 Mortise Cylinder

• Adams Rite 4066 Thumbturn

The lock can accept a cylinder from:

• Exterior only

• Interior only

• Both sides

depending on the required configuration.

Cylinder and thumbturn are sold separately.

Compatible Lever Handles

The 4900 is compatible with several Adams Rite deadlatch handles, including:

• 4560 Deadlatch Handle

• 4565 Deadlatch Handle

• 4568 Eurostyle Handle

• 4569 Eurostyle Handle

• 4600 Heavy Duty Designer Deadlatch Handle

These handles mechanically retract the latchbolt for convenient commercial door operation.

Compatible Paddle Trim

Compatible paddle options include:

• 4590 Deadlatch Paddle

• 4591 Deadlatch Paddle

Paddles provide simple push or pull operation depending on the selected configuration.

Entry & Keyless Trim Options

Compatible trim options may also include:

• 3080 Series Entry Trim

• 3080E Electrified Entry Trim

• 3090-150 eForce® Keyless Entry

• 3090P

• 3090C

• A100-3090 Series Keyless Entry

Verify exact trim compatibility and required door configuration before ordering.

Electric Strike Compatibility

The 4900 can be paired with compatible Adams Rite electric strikes for access-control applications.

Compatible families include select:

7100 Series Electric Strikes

Designed for compatible Adams Rite deadlatches with 1/2" to 5/8" latchbolt projection.

UltraLine® 7400 Series

Available for applications requiring features such as preload capability and outdoor-rated configurations.

Strike selection depends on:

• Frame type

• Door thickness

• Jamb profile

• Voltage

• Fail-secure or fail-safe operation

• Monitoring requirements

• Environmental exposure

Standard 4902 Strike

The standard strike supplied with the 4900 is the:

Adams Rite 4902

The 4902-01 Short Box Flat Strike is designed for a flat jamb where the door closes flush or nearly flush with the frame.

It includes:

• Molded black plastic dust box

• Steel mounting plate

4901 Retrofit Strike

For retrofit installations, Adams Rite recommends the:

4901 Series Strike

The longer faceplate is designed to span compatible existing MS® Deadlock strike preparations.

4901-01

Flat flush-mount strike.

4901-02

Radius strike for applications such as the opposing stile of paired doors.

Long-lip strike configurations are also available for compatible center-hung and specialty applications.

Faceplates

The 4900 uses a:

1" x 6-7/8" Faceplate

The standard package supplies both:

• Flat faceplate

• Radius faceplate

The flat faceplate can also be field adjusted for compatible:

• Right-beveled edges

• Left-beveled edges

Handing

The solid-brass latchbolt is easily reversible.

No special tools are required to change handing.

Always verify the complete:

• Door handing

• Bevel

• Faceplate

• Strike

configuration before installation.

Minimum Door Thickness

Adams Rite specifies a minimum door thickness of:

1-3/4"

Verify door thickness and trim requirements before ordering.

Lock Case

The 4900 uses a steel case with corrosion-resistant plating.

Approximate Case Dimensions

Width: 7/8"
Height: 5-13/16"
Depth: Varies according to backset

Screw-fastened tube-spacer brackets help simplify removal when the lock is installed with tab mounting.

Finish Options

Available faceplate finishes include:

• 628 – Clear Anodized Aluminum

• 313 – Dark Bronze Anodized

• 335 – Black Anodized

4913 Lock Body Option

For repair or special installations, Adams Rite offers:

4913 – Lock Body Without Faceplate or Strike

This is useful when compatible existing components are being reused or the opening requires a special configuration.

4900 vs. 4920AN

4900 Series

Designed for:

Aluminum-Stile Doors

4920AN Series

Designed for:

• Hollow metal doors

• Wood doors

Choose the version that matches the door construction and preparation.

Common Applications

Ideal for:

• Aluminum storefront doors

• Narrow-stile doors

• Retail entrances

• Office buildings

• Schools

• Healthcare facilities

• Government facilities

• Banks

• Commercial buildings

• Institutional facilities

• Access-controlled entrances

Product Specifications

Brand: Adams Rite
Series: 4900 Series
Product Type: Heavy Duty Deadlatch
Door Application: Aluminum-Stile Commercial Doors
Latchbolt Material: Solid Brass
Latchbolt Size: 5/8" x 1"
Latchbolt Throw: 5/8"
Auxiliary Deadlatch: Stainless Steel
Latch Holdback: Yes
Handing: Reversible
Backsets: 31/32", 1-1/8", 1-1/2"
Cylinder: 1" x 1-5/32" Mortise Cylinder
Cylinder Cam: Adams Rite MS® Cam
Case Material: Plated Steel
Case Size: 7/8" x 5-13/16" x Depth According to Backset
Faceplate: 1" x 6-7/8"
Standard Strike: 4902
Retrofit Strike: 4901 Available
Minimum Door Thickness: 1-3/4"
Finish Options: 628, 313, 335
Cylinder Included: No

Standard Package

The standard package includes:

• 1 Adams Rite 4900 Heavy Duty Deadlatch

• Flat faceplate

• Radius faceplate

• Standard 4902 strike plate

• Mounting screws

Not Included Unless Specifically Stated

• Mortise cylinder

• Thumbturn

• Lever handle

• Paddle trim

• Entry trim

• Electric strike

• Keyless entry trim

• Door

• Frame

• Installation labor

Important Ordering Information

Before ordering, verify:

• 4900 Series

• Aluminum-stile door application

• Required backset:

  • 31/32"

  • 1-1/8"

  • 1-1/2"

• Door thickness

• Door handing

• Door-edge profile

• Required finish

• Standard or retrofit strike

• Mortise cylinder requirements

• MS® cam compatibility

• Lever or paddle trim

• Electric-strike requirements, if applicable

Retrofit Note

When replacing an MS1850S, 4510, or discontinued 4700 Series lock, confirm the existing preparation, backset, and faceplate configuration before ordering.