Adams Rite MS+1891W - Series MS® Deadlock/Deadlatch - Radius Faceplate with Weatherstrip

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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. Click here to see our Door Handing guide.

Adams Rite MS+1891W - Series MS® Deadlock w/ Latchbolt - Radius Faceplate with Weatherstrip

MS+1891W Series MS Deadlock with Latchbolt Radius Faceplate with Weatherstrip provides a maximum security deadlock for after hour and traffic control with deadlatch convenience during business hours.


Maximum security MS+ deadlock after hours, plus the convenience of traffic control management during the business day. Typical installation is a bank or store requiring three modes of door control:

1. Both lock and latchbolts retracted for unrestricted entry and exit during business hours

2. Handle-operated latch for exit-only traffic just after closing

3. Maximum security MS hookbolt for overnight lockup. When using trim (available separately) to activate, handle or paddle operates latchbolt only.


360° turn of key or thumbturn projects or retracts the hookbolt. 120° further turn retracts latchbolt as well. MS1891W Deadlock w/ Latchbolt 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. The MS1891W Deadlock w/ Latchbolt accepts cylinder from either or both sides. When using trim (available separately) to activate, handle retracts springloaded latchbolt only. For door thickness other than 1-3/4”, please contact us.


Cylinder Backset

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


Measures 1" x 7-3/8" x depth [25.4 mm x 187.3 mm x depth], depth varies by backset (see table below). Steel with corrosion-resistant plating.


Deadlock bolt: 5/8" x 1-3/8" [15.9 mm x 34.9 mm] with 13/16" [20.6 mm] throw. Eight-ply laminated stainless steel. Center ply has alumina-ceramic core to defeat any hacksaw attack, including rod-type “super” hacksaws, while hook shape repels pry bar attempts to “spread” the door from its jamb or lift it off its track.

Latchbolt: Measures 5/8" x 5/8" [15.9 mm x 15.9 mm] with 7/16" [11.1 mm] throw. Zinc alloy with Delrin face for smooth, quiet action. Handing easily reversible. Bolt can be held fully retracted to allow door to be free swinging (see illustration below).


Armored strike with satin stainless steel trimplate with steel mounting plate and dust box. Flat strike furnished. Also available for pairs of doors in radius shape, or flat with square corners for ANSI hollow metal jambs. Flat strikes also available with longer lip. MS+1891W Deadlock w/ Latchbolt cannot be used with electric strikes.

Standard Package

Individually boxed with strike and machine screws for mounting. Cylinder and/ or thumbturn available separately.

Shipping weight

2 lbs [.91 kg]


Handle, paddle available separately for one side only or both sides. Handles, paddles on both sides solve, with minimum traffic impediment, the problem of doors that stand ajar due to wind or air-conditioning pressures.

Available in right hand or left hand configurations.

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 MS1891W Deadlock with Latchbolt Dimensions


Click here to download Adams Rite MS1891W Catalog
Click here to download Adams Rite MS1891W Installation Instructions
Click here to download Adams Rite Price List