MS1890 Deadlock, Flat Strike/Standard Jamb - Adams Rite

AR MS1890
Part #:
$147.61 - $162.32

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Product Overview

MS1890 Series MS Deadlock/Deadlatch provides a maximum security deadlock for after hour and traffic control with deadlatch convenience during business hours. 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, and (3) Maximum security MS hookbolt for overnight lockup. 360 degree turn of key or thumbturn projects or retracts the hookbolt. 120 degree further turn retracts latchbolt as well. 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. When using trim (available separately) to activate, handle retracts springloaded latchbolt only.

Warranty Information

5 Years Limited


  • Action
    Turn key or thumbturn project or retracts the hookbolt
  • Additional Information
    Eight-ply laminated stainless steel. Center ply has alumina-ceramic core to defeat any hacksaw attack, while hook shape repels pry bar attempts to "spread" the door from its jamb or lift it off its track.
  • Application
    Swinging doors
  • Bolt
    5/8" x 1-3/8" (15.9 mm x 34.9 mm)
  • Bolt Throw Length
    13/16" (20.6mm)
  • Country of Origin
  • Cylinder
    not included
  • Door Material
  • Faceplate Size
    1" x 6-7/8" (25.4mm x 174.6mm)
  • Function
    Deadlock after hours, plus the convenience of traffic control management during the business day
  • Grade
    Grade 1
  • Includes
    Strike and Machine Screws
  • Latch Type
    Bolt measures 5/8" x 5/8" (15.9mm x 15.9mm)
  • Material
  • Metric Size
    25.4mm x 187.3mm x 57.2mm Case
  • Rust Inhibitor
    Corrosion Resistant Plating
  • Series
    Adams Rite MS+1890 Series Deadlocks/Deadlatches
  • Size
    1" x 7-3/8" x 2-1/4" Case
  • Unit of Measure
  • Use With
    Any Standard 1" (25.4mm)L, 1-5/32" (29.4mm) Dia. Mortise Cylinder with MS Cam
  • Weight