4920AN Heavy Duty Deadlatch (ANSI Size)

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

Function: For hollow metal or wood doors prepared for hardware according to the specifications of the American National Standards Institute (ANSI), 4920AN Heavy Duty Deadlatches provide precise traffic control. 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. Interchangeable, without door modification, with any MS1850SN Deadlock of same faceplate shape and backset. Replaces 4520 and 4720 ANSI Deadlatches. 1-3/4” minimum door thickness required.

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. Uses any standard mortise cylinder with MS® dimensioned cam.


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

Cylinder Backset: 1-1/2” or 2-3/4” only

Case: Measures 7/8” x 5-13/16” x depth. Depth varies by backset (see table on catalog page). Steel with corrosion-resistant plating.

Latchbolt: 5/8” x 1” x 5/8” throw. Solid brass. Handing is easily reversible using only a screwdriver.

Auxiliary Latchpin: Stainless steel. Deadlocks latch bolt to prevent “loiding” or case-knife entry.

Faceplate: 1-1/4” x 8” armored flat faceplate can also be adjusted in the field for right or left beveled edge doors.

Strikes: Stainless steel, US32D Satin finish (630). 4506-02 Strike furnished to ANSI preparation specifications for flat jamb.

Cylinder Cam: Operable by any standard mortise cylinder with MS® cam, dimensioned as shown. Cylinders with MS® cams can be readily obtained from most cylinder manufacturers. See CYLINDERS for cylinder make, thumbturn and trim ring information.

Options: Backset, strike, and finish must be specified when ordering. For information on handles, paddles, and lever operators, see TRIM. See ELECTRIC STRIKES for compatible access control products. See 4900 Heavy Duty Deadlatch for aluminum stile door applications.

Standard Package: Individually boxed with faceplate, strike, and machine screws for mounting. Order cylinders, paddles, handles or lever operators separately. Shipping weight: 1-1/4 lbs.


Related Products: When purchasing this product, please consider the following related products, available separately:

Accessories Cylinders Trim Electric Strikes
Lock mounting accessories and options available separately. Operable by any standard mortise cylinder with MS® cam, dimensioned as shown. Please see CYLINDERS for more cylinder, thumbturn and trim ring information. Entry trim, paddles, handles and lever operators available separately. Application specific.