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.


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