MS 1850SNSI - Maximum Security Deadlock

With the development of new products Adams Rite is using their experience and innovation to produce quality products for existing and new markets.

In this section you will find products that meet the needs of almost any security application or standard in Europe.


The Adams Rite MS® 1850SNSI Maximum Security Deadlock is identical in operation to the MS® 1850S series Deadlock and is for use in steel or timber doors.


  • Available for use on timber and steel doors.
  • Interchange without stile modification with the 4720ANSI deadlatch
  • AC
  • Longer fixing tab positions to enable greater fixing security.
  • 3 year guarantee



Round Cylinders ~ MS®4043 Cylinder Guard ~ Round Thumbturns
Trim Strikes ~ 4015 Threshold Bolt





Overall Case Size: 201.7mm x 31.7mm x 57.1mm.
Case: Steel with corrosion-resistant plating.
Backset: 38.1mm (1 1⁄2").
Lock Bolt: 34.9mm x 15.9mm.
8 Ply Laminated Steel with patented
Alumina-Ceramic Anti-Saw Core.
Bolt Throw: 34.9mm (Barbolt), 20.6mm (Hookbolt).
Mechanism: Carbon Steel Actuating Mechanism.
Cylinder: Any standard 29.4mm (1 5⁄32") Mortice
Cylinder or Thumbturn with MS® cam.
Operation: 360º turn of key or thumbturn.
Key only removable when bolt is
positively locked or unlocked.
Door Gap: Maximum 3mm.
Two Point Locking: Specify 4015 Threshold Bolt.
Forend: Steel, with aluminium faceplate