Adams Rite 4920AN - Heavy Duty Deadlatch (ANSI Size), Flat faceplate

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3.00 LBS
Width x Height x Depth:
2.00 (in)


3.00 (in)


9.00 (in)

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Calculated at Checkout

Note: Left Hand Handing is the same as Right Hand Reverse Handing and Right Hand Handing is the same as Left Hand Reverse Handing. See handing chart for clarification. See our door handing guide for more information.

Adams Rite 4920AN Heavy Duty Deadlatch (ANSI Size) - Flat Faceplate, 1-1/2” or 2-3/4” backset

4920AN Heavy Duty Deadlatch provides flexible traffic control and easy installation for wood or hollow metal doors.


Flexibility of traffic control and installation is offered by 4920AN Heavy Duty Deadlatch. A key-controlled bolt hold-back feature allows for two-way traffic for applications which require free entrance at certain times and exit-only at other times. This allows a "locked" entrance to be used as an exit by visitors already in the building. 1-3/4" [44.5 mm] minimum door thickness required. Interchangeable, without stile modification, with any MS1850SN Deadlock of same backset and faceplate shape. Replaces 4520 and discontinued 4720 ANSI Deadlatches. For hollow metal or wood doors prepared for hardware according to the specifications of the American National Standards Institute (ANSI).


Turn key or operate handle or paddle to retract spring-loaded latchbolt of the 4920AN Heavy Duty Deadlatch. To hold bolt retracted, push it in and secure by reverse turn of key. Lock accepts any standard 1" [25.4 mm] length, 1-5/32" [29.4 mm] diameter mortise cylinder with MS® cam such as the 4036 Mortise Cylinder or thumbturn such as the 4066 Thumbturn, available separately. Lock accepts cylinder from either or both sides.


Cylinder Backset

1-1/2" [38.1 mm] or 2-3/4"[69.9 mm] only.


Steel with corrosion-resistant plating. Measures 7/8" x 5-13/16" x depth [22.2 mm x 147.6 mm x depth]. Depth varies by backset (see table below).

Bolt Holdback

While bolt is held fully retracted, a reverse turn of the key retains the bolt, allowing the door to be free swinging.


Solid brass. Handing is easily reversible without special tools. Measures 5/8" x 1" x 5/8" [15.9 mm x 25.4 mm x 15.9 mm] throw.

Auxiliary Linchpin

Stainless steel. Deadlocks Latchbolt to prevent “loiding” or case-knife entry.


Measures 1-1/4" x 8" [31.8 mm x 203.2 mm] armored flat faceplate can also be adjusted in the field for right or left beveled edge doors.


4506-02 Strike furnished to ANSI preparation specifications for flat jamb. Stainless steel, US32D Satin finish (630). Available without strike (-000).

Standard Package

Individually boxed with strike plate, faceplate, and mounting screws. Cylinder, paddle, handle available separately.

Shipping Weight

1-1/4 lbs [0.57 kg].


Backset, faceplate shape, strike, handing, and finish must be specified when ordering. See 4900 Heavy Duty Deadlatch for aluminum stile door applications.

Available in choice of 313 Dark bronze anodized, 335 Black anodized, 628 Clear anodized.

Click here for our Definitive List of Door Hardware Finishes

Adams Rite 4920AN Heavy Duty Deadlatch Installation


Click here to download Adams Rite 4920AN Series Catalog
Click here to download Adams Rite 4920AN Series Installation Instruction
Click here to download Adams Rite Price List