MS1837 Series MS® Two-Point Deadlock

Maximum security for wood door pairs is provided with the MS1837 Two-Point Deadlock. A single turn drops a bolt into the threshold and pivots the MS bolt.


Maximum security for wood door pairs is provided by the MS1837 deadlock witha single turn of a key. Simultaneously dropping a stainless steel hexbolt into the threshold and pivoting the massive MS bolt into the opposite leaf, the MS1837 eliminates inconvenient and sometimes forgotten flushbolts in the inactive leaf.


360° turn of key or thumbturn projects counterbalanced bolt into opposite door and drops bolt into threshold. Key can be removed only when bolts are 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 from either or both sides.


Cylinder Backset: 1-1/2" [38.1 mm] only.

Cylinder Height: 36" [914.4 mm] standard. Other cylinder heights available on special order, specify exact height from bottom of door to cylinder center. Maximum cylinder height 65" [1651 mm].

Case: Measures 1" x 6" x 2-3/16"[25.4 mm x 152.4 mm x 55.6 mm]. Steel with corrosion-resistant plate.

Pivoted Bolt: 5/8" x 1-3/4" x 2-7/8" [15.9 mm x 44.5 mm x 73.0 mm] with 1-3/8" [34.9 mm] throw. Eight-ply laminated steel with alumina ceramic core to deter hacksaw attack.

Threshold Bolt: Hexagonal 3/8" [9.5 mm], flat to flat. Stainless steel.

Armored Faceplate: Flat, two-piece plate extends to bottom of door.

Strike: For MS bolt, a 4001-011 Strike Plate with dust box is furnished. Threshold bolt strike can be 1/2" [12.7 mm] diameter hole in metal threshold or, if threshold is wood, 4005 Strike is available separately.

Standard Package: MS lock individually boxed with mounting screws. Hexbolt and rod packed separately with face extension plate, screws, bottom bolt guide, and attachment pin. Cylinder and/or thumbturn available separately.

Shipping weight: 3 lbs [1.36 kg]


• Available in choice of 313 Dark bronze anodized, 335 Black anodized, 628 Clear anodized, US3 (605) Bright brass, US26D (626) Satin chrome


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

Accessories Cylinders
4005 Strike for wooden threshold  Standard 1" length, 1-5/32” diameter mortise cylinder with MS® cam such as 4036 Mortise Cylinder, 4066 Thumbturn