MS1850SN ANSI Size Deadlock, Flat Faceplate, Straight Bolt - Adams Rite

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Product Overview

The ANSI size MS1850SN-45X Series MS Deadlock utilizes a stainless steel hook bolt activated by a pivot mechanism to provide maximum security for hollow metal or wood doors. The ANSI size MS1850SN-45X Series MS Deadlock provides maximum security and ease of installation for hollow metal or wood sliding doors. Its standard 1-1/2" (38.1 mm) backset dimension provides adequate clearance for the deep jamb "pocket" of many commercial and industrial entrances. The locking mechanism is identical to the widely used MS1850S Series MS Deadlock, 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 maximum security (MS) locking action assures that forced entry attempts to pry the door in any direction, up, down, or sideways will be defeated. Also useful for swinging doors closing against jambs too shallow for the 1-3/8" (34.9 mm) throw of the MS1850SN Series MS Deadlock. 360 degree 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 from either or both sides.

Warranty Information

5 Years Limited


  • Action
    Turn key or thumbturn to project or retract the counterbalanced bolt
  • Additional Information
    Eight-ply laminated stainless steel bolt. Center ply has alumina-ceramic core to defeat any hacksaw attack
  • Application
    Swinging doors
  • Bolt
    5/8" x 1-3/8" x 2-7/8" (15.9 mm x 34.9 mm x 73 mm)
  • Bolt Throw Length
    1-3/8" (34.9 mm)
  • Country of Origin
  • Cylinder
    not included
  • Door Material
    Wood or Hollow Metal
  • Face Shape
    Flat, Armored
  • Faceplate Size
    1-1/4" x 8" (31.8mm x 203.2mm)
  • Function
    Maximum Security
  • Grade
    Grade 1
  • Hand
  • Includes
    Faceplate, Mounting Screws
  • Material
  • Metric Size
    25.4mm x 152.4mm x 57.2mm Case
  • Rust Inhibitor
    Corrosion Resistant Plating
  • Series
    Adams Rite MS1850SN Series Deadlocks
  • Size
    1" x 6" x 2-1/4" Case
  • Strike
    not included
  • Unit of Measure
  • Use With
    Any Standard 1" (25.4mm)L, 1-5/32" (29.4mm) Dia. Mortise Cylinder with MS Cam