Mechanical storefront deadlock that lets staff lock the door by twisting, with no key and no code, while only key holders can unlock it from outside.
- Twist-to-lock: employees secure the door without a key or code; entry is by key only (SC keyway cylinder included).
- Direct, drill-free replacement for Adams Rite MS1850S-style mortise locks in narrow stile aluminum storefront doors (same mortise, bolt, faceplate, screw holes, strike and backset).
- Interior knob with stay-open (passage) and stay-closed modes.
- 100% mechanical: no batteries, no wiring.
- Drill-free installation with a screwdriver using the existing door prep.
Measuring backset: measure from the center of the cylinder hole to the edge of the door. Backset is 31/32", 1-1/8" (most common) or 1-1/2". Order the correct backset; a lock with the wrong backset will not fit.
Specifications
| Model | SM1850 |
| Function | Keyless locking, keyed entry |
| Bolt | Deadbolt or hookbolt |
| Backset | 31/32", 1-1/8" or 1-1/2" (1-1/2" available with hookbolt) |
| Door thickness | 1-3/8" to 1-3/4" |
| Cylinder | SC keyway, included |
| Material | Zinc alloy and steel |
| Finish | Silver or black, lacquered |
| Warranty | 3-year mechanical |