Adams Rite 4900 - Heavy Duty Deadlatch, Any Handing

(You save $17.69 )
(No reviews yet) Write a Review
3.00 LBS
Width x Height x Depth:
2.00 (in)


3.00 (in)


9.00 (in)

Don't see the quantity, finish, or function you are looking for? We can mix, match and "BUILD" the item option set you are looking for - Just call us at 860-537-1328 and our sales staff will assist !

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. Click here to see Door Handing guide.

Adams Rite 4900 Heavy Duty Deadlatch | Adams Rite 4900 Aluminium Door Latches - Any Handing, 31/32", 1-1/8", or 1-1/2" backset

The Adams Rite 4900 Heavy Duty Deadlatch are designed to secure your aluminium door. These deadlatches are popular locks manufactured by Adams Rite. The highlight of these aluminium door latches is that they are not only easy to install but flexible to operate. These deadlatches can be easily switched from allowing two way free movement (entry and exit) of traffic to allowing free exit only traffic. This feature makes these locks ideal for use in businesses such as stores, banks and healthcare places, where during business hours it is required that people can come in and leave freely and after business hours, only those people who are inside can leave freely (free exit only). 

Operating these aluminium door latches is extremely simple. To open the door simply turn the key or operate the handle/paddle to retract the spring loaded deadlatch. To allow free movement of traffic on both sides, simply hold the bolt retracted, push it in and secure by reverse turn of key.

Use these 4900 aluminium door latches, if you are looking to change an Adams Rite MS1850 deadbolt, or are looking to retrofit an existing Adams Rite 4510 standard duty deadlatch or the discontinued Adams Rite 4700 deadlatch with a heavy duty deadlatch. Call our experts at for any questions that you might have.


Flexibility of traffic control and easy installation is offered by the Adams Rite 4900 Aluminium Door latches. 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 MS1850S deadbolt of same backset and faceplate shape. Also retrofits to existing 4510 and discontinued 4700 Deadlatch preparations.


Turn key or operate handle or paddle to retract spring-loaded latchbolt of the Adams Rite 4900 aluminium door latches. 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. This 4900 heavy duty deadlatch accepts cylinder from either or both sides.


Cylinder Backset

31/32" [24.6 mm], 1-1/8" [28.6 mm], or 1-1/2" 38.1 mm].


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). Screw-fastened tube spacer brackets allow for cleaner removal when tab mounting

Bolt Holdback

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


The latchbolt of the 4900 aluminium door latches is made of 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 latch bolt to prevent “loiding” or case-knife entry.


Measures 1" x 6-7/8" [25.4 mm x 174.6 mm]. Both flat and radius faceplates are supplied. Flat faceplates can also be adjusted in the field for right or left beveled edge doors.


Standard strike furnished is 4902 for flat jamb where door closes flush or nearly flush. Specify 4901 for retrofit installations. Also available: radius strike for opposite stile in paired doors and long lip strikes for center-hung doors.


Adams Rite 4900 Heavy Duty Deadlatch Finishes Guide | Adams Rite 4900 Aluminium Door Latches Finishes Guide
Click here for our Definitive List of Door Hardware Finishes

Standard Package

Individually boxed with strike plate, flat and radius faceplates, 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 the Adams Rite 4900. See 4920AN Heavy Duty Deadlatch (ANSI Size) for wood and hollow metal door applications.

The 4900 aluminium door latches are available in choice of 313 Dark bronze anodized, 335 Black anodized, 628 Clear anodized.

Adams Rite 4900 Heavy Duty Deadlatch Installation Dimensions | Aluminium Door Latches Installation Dimensions


Click here to download Adams Rite 4900 Series Catalog
Click here to download Adams Rite 4900 Series Installation Instruction
Click here to download Adams Rite Price List