Lockwood 3770 MkII Mortice Nightlatch — 60 mm Backset, Satin Stainless (SSS)
The Lockwood 3770 MkII is a mortice nightlatch for commercial and institutional doors. It latches automatically on closing, suits 570 cylinders, and is designed for heavy-duty use in schools, hospitals, hotels and similar buildings. Inside operation is via turnsnib or key; outside via key.
Estimated Warehouse Dispatch: 2 Days
Key Features
- Nightlatch function: door auto-latches when closed; key operation outside, turnsnib/key inside.
- 60 mm backset standard (this model).
- Heavy-duty mortice case for commercial environments.
- Through-fixing provision for roses/escutcheons for robust furniture anchoring.
- Compatible with Lockwood 570 cylinders and restricted systems.
- Reversible handing; suits 32–50 mm door thickness.
Fire Rated
- Tested up to 4 hours on fire door assemblies (per manufacturer data).
Specifications
- Item Code: 3770SS
- Function: Mortice Nightlatch (Primary)
- Backset: 60 mm
- Door Thickness: 32–50 mm
- Handing: Reversible
- Case Material: Zinc
- Bolt/Latch: 15 mm projection; stainless steel latchbolt
- Cylinder: 570 profile; 2-cylinder configuration
- Standards (AS4145.2): Security S7, Durability D8, Corrosion C6
- Use: Commercial/industrial/institutional doors
What's In The Box
- Lockwood 3770 MkII mortice nightlatch body (60 mm backset)
- Faceplate & strike (Satin Stainless Steel – SSS)
- Fixing screws
3770 MkII Nightlatch — Item Code Family
Warranty
- Mechanical Warranty: 25-year mechanical warranty (conditions apply).
- Finish & other components: As per Lockwood warranty terms.
Download PDF Resources
|
Lockwood 3700 Series Mortice Locks — Service Manual |
|
Lockwood Selector 3700 Series Mortice Locks — Catalogue |
|
Lockwood 25-Year Mechanical Warranty (Conditions Apply) |
Additional Information
- Suitable for pairing with a wide range of Lockwood 1800/2800 series furniture and 570 cylinders (sold separately).
- Hold-back: not available on nightlatch function.
