Provide dependable traffic control for commercial hollow metal and wood doors with the Adams Rite 4920AN46-602-628 Heavy Duty Deadlatch.

Designed for doors prepared to ANSI hardware dimensions, the 4920AN provides a heavy-duty spring-loaded latchbolt with a key-controlled bolt holdback function. This allows the opening to operate with free two-way traffic during designated periods and then return to controlled entry while maintaining normal egress.

This exact configuration features a 1-1/2" backset, RH or LHR handing, flat armored faceplate, 4506-02 ANSI strike, and 628 Clear Anodized finish.

Key Features

• Heavy-duty commercial deadlatch

• Designed for ANSI-prepared wood and hollow metal doors

• 1-1/2" cylinder backset

• RH or LHR configuration

• Key-controlled bolt holdback

• Allows free-swinging operation when latchbolt is held retracted

• Solid brass latchbolt

• Stainless steel auxiliary latchpin

• Helps resist loiding and case-knife attacks

• Corrosion-resistant plated steel lock case

• Heavy-duty armored flat faceplate

• Clear anodized 628 architectural finish

• Includes ANSI-prepared 4506-02 strike

• Compatible with standard Adams Rite deadlatch trim options

• Retrofit-compatible with matching MS1850SN preparations

• Replaces older Adams Rite 4520 and discontinued 4720 ANSI deadlatches

Key-Controlled Bolt Holdback

One of the primary features of the 4920AN is its bolt holdback function.

When the latchbolt is fully retracted, a reverse turn of the key can retain the bolt in the retracted position.

This allows the door to operate freely during periods when unrestricted two-way traffic is desired.

When the holdback is released, the spring-loaded latchbolt returns to normal operation.

This makes the deadlatch ideal for entrances that require:

• Free access during business hours

• Controlled entry after hours

• Exit capability from inside the building

• Key-controlled traffic management

Solid Brass Latchbolt

The 4920AN uses a heavy-duty:

Solid Brass Latchbolt

Approximate latchbolt dimensions:

• 5/8" high

• 1" wide

• 5/8" throw

The latchbolt is designed for demanding commercial applications and frequent operating cycles.

Auxiliary Latchpin

A stainless steel auxiliary latchpin works with the latchbolt to help prevent unauthorized manipulation.

When properly installed against the strike, the auxiliary feature deadlocks the main latchbolt to help resist:

• Loiding

• Credit-card attacks

• Case-knife entry

• Similar latch manipulation

1-1/2" Backset

This exact configuration uses:

1-1/2" Backset

In the Adams Rite ordering code:

4 = 1-1/2" Backset

Adams Rite also manufactures the 4920AN with a 2-3/4" backset, but that is a different configuration.

RH / LHR Handing

The ordering code:

6 = RH or LHR

This unit is therefore configured for:

• Right Hand

• Left Hand Reverse

The latchbolt itself can be reversed for handing without specialized tools, but the ordered configuration should still match the intended installation.

Flat Armored Faceplate

The deadlatch includes a heavy-duty:

1-1/4" x 8" Flat Armored Faceplate

The flat faceplate can also be field adjusted for compatible right- or left-beveled door edges.

Faceplate Finish

628 – Clear Anodized

This architectural finish coordinates with common clear-anodized commercial door hardware.

4506-02 ANSI Strike Included

The -602 configuration includes the:

Adams Rite 4506-02 Deadlatch Strike

The strike is designed for ANSI-prepared flat jamb applications.

Strike Finish

630 / US32D Satin Stainless Steel

The strike is stainless steel even though the deadlatch faceplate is 628 Clear Anodized.

ANSI Size Deadlatch

The 4920AN is specifically designed for:

• Hollow metal doors

• Wood doors

• ANSI-prepared commercial openings

This differs from the standard Adams Rite 4900, which is primarily intended for aluminum stile applications.

Cylinder Requirements

The lock accepts a standard:

• 1" length mortise cylinder

• 1-5/32" diameter

• Adams Rite MS cam

Compatible examples include the Adams Rite:

• 4036 Mortise Cylinder

• 4066 Thumbturn

Cylinder is sold separately.

The lock can accept cylinder operation from either or both sides depending on the complete door configuration.

Compatible Trim

Compatible Adams Rite trim options may include:

• 3080 Series Entry Trim

• 3080E Series

• 3090 Series

• 4560 Deadlatch Handle

• 4565 Deadlatch Handle

• 4568 / 4569 Eurostyle Handles

• 4590 / 4591 Paddles

• 4600 Deadlatch Handle

Trim is sold separately.

Retrofit Compatibility

The 4920AN is designed to interchange, without stile modification, with compatible:

Adams Rite MS1850SN Deadlocks

when the existing opening has the same:

• Backset

• Faceplate configuration

• Door preparation

This can make the 4920AN an excellent retrofit option when converting an existing commercial opening from a deadlock to a latch-style traffic-control system.

Replacement for Earlier Deadlatches

Adams Rite identifies the 4920AN as a replacement for:

• 4520 ANSI Deadlatch

• 4720 ANSI Deadlatch – discontinued

Always verify the existing preparation and backset before ordering.

Commercial Applications

Ideal for:

• Commercial offices

• Retail entrances

• Schools

• Universities

• Hospitals

• Healthcare facilities

• Government buildings

• Hotels

• Institutional facilities

• Hollow metal doors

• Wood commercial doors

• Controlled-entry openings

Standard Package

The standard 4920AN package includes:

• Deadlatch lock body

• Flat armored faceplate

• 4506-02 strike

• Mounting screws

Sold Separately

• Mortise cylinder

• Thumbturn

• Paddle

• Lever/handle trim

• Electric strike

• Cylinder guard

• Access-control components

Important Ordering Information

Before ordering, verify:

• Part Number: 4920AN46-602-628

• 1-1/2" backset

• RH or LHR handing

• ANSI door preparation

• Flat faceplate

• 4506-02 strike requirement

• 628 Clear Anodized faceplate finish

• Minimum 1-3/4" door thickness

• Required cylinder and trim

This listing does not include a mortise cylinder, thumbturn, paddle, lever trim, or electric strike unless specifically stated.