MS1950 Series MS®, MS1950-X5X Series MS® Deadlocks

The stainless steel MS1950 Series MS® Deadlock utilizes a laminated stainless steel bolt, to provide maximum security for a single leaf narrow stile aluminum door.
The stainless steel MS1950-X5X Series MS® Deadlock utilizes a laminated stainless steel hookbolt, to provide maximum security for a sliding narrow stile aluminum door.
Both are activated by a pivot mechanism.


A huge bolt of laminated stainless steel, nearly 3" long, activated by an uncomplicated pivot mechanism, has made the basic MS1950 MS® Deadlock the standard of the narrow stile aluminum door industry. The length of this bolt provides maximum security for a single leaf door, even a very tall and flexible one or an installation where the gap between the door and jamb is greater than it should be.
The stainless steel MS1950-X5X Series MS® Deadlock answers the security need of sliding doors in commercial, industrial, and institutional buildings. The mechanism is identical to the widely used Maximum Security swinging door lock, except that the massive laminated bolt is provided in a hook shape to resist the parting motion of sliding door and jamb. The over-center MS locking action assures that forced entry attempts to pry the door in any direction, up, down, or sideways, will be defeated.


360° turn of key or thumbturn projects or retracts the counterbalanced bolt. Key can be removed only when bolt is in a positively locked or unlocked position. 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 on either or both sides.


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

Case: Measures 1" x 6" x depth [25.4 mm x 152.4 mm x depth], depth varies bybackset (see catalog page). Fully stainless steel case and internal components.

Bolt: Eight-ply laminated stainless steel. Center ply has alumina-ceramic core to defeat any hacksaw attack, including rod-type “super” hacksaws.
MS1950 Bolt: Standard straight bolt measures 5/8" x 1-3/8" x 2-7/8" [15.9 mm x 34.9 mm x 73.0 mm] with 1-3/8" [34.9 mm] throw.
MS1950-X5X Bolt: 5/8" x 1-3/8” [15.9 mm x 349.9 mm] with 13/16” [20.3 mm] throw. Hookshape repels pry bar attempts to “spread” the door from its jamb or lift it off its track.

Faceplate: Measures 1" x 6-7/8" [25.4 mm x 174.6 mm].

Strike: See catalog page for dimensions of strike slot which can be cut in metal jamb. Trim plate, box strike, and armored strike are available separately.

Standard Package: Individually boxed with machine screws for mounting. Cylinders and/or thumbturns available separately.

Shipping weight: 1-1/2 lbs. [0.68 kg]


• “SCHOOLHOUSE” version, also available, is modified so that operation from inside is “unlock only”. This lock is handed and must be specified LH or RH. Specify Series SCH1950, (-X5X). Same faceplate and backset options as Series MS1950, (-X5X).


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

Accessories Cylinders Trim Special Order Options

4000, 4001, MS4002 Deadlock Strikes4015 Threshold Bolt4016 Header Boltfor multi-point locking, 4085 Header Boltfor pairs of doors.  

4089 Exit Indicator

Lock mounting accessories and options

Standard 1" length, 1-5/32” diameter mortise cylinder with MS® cam such as 4036 Mortise Cylinder, 4066ThumbturnMS4043 Cylinder Guard 

3090-1503090P, 3090CA100 Series Keyless Entry, 4550 Deadlock Lever

Schoolhouse function available as special order.