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ASS876150
Assa 8561 (8761) Modular Nightlatch 50mm Zinc Plated
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with reversible latchbolt
In stock
Delivery Information
| Delivery Time Frame | Delivery Information |
| Next Working Day By 1PM | When an order is placed by 3pm for next working day on certain items |
| Standard Delivery | Usually delivered in 2 to 4 working days |
| Delivery Charges | |
| UK Mainland | Prices start at £3.95 for very small items, £6.50 for small, £9.50 for medium and £20 for large/long items |
| Scottish Highlands & Islands, Northern Ireland & Ireland | Prices from £30, please see our delivery page for more info. |
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£179.92
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£149.93
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£125.94
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£104.95
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Description
Assa 8561 (8761) Modular Nightlatch 50mm Zinc Plated
When selecting hardware for high-traffic environments, reliability remains the most critical factor. The Assa 8561 (8761) Modular Nightlatch 50mm Zinc Plated represents the gold standard in architectural ironmongery. It is engineered specifically for commercial doors where safety and smooth operational flow must coincide without compromise.
This high performance lockcase offers exceptional durability for heavy usage areas like hospitals, schools, and busy office buildings. Its modular construction allows for a diverse range of configuration options, ensuring that it adapts seamlessly to the unique architectural needs of your building.
Understanding the Mechanical Engineering
The internal mechanics of this hardware are built to withstand the rigours of constant daily operation. At the heart of the device, precision-engineered springs manage the tension required to retract the latchbolt while ensuring the mechanism remains fluid under stress. By utilising high-grade steel components, the internal structure prevents material fatigue that often occurs in inferior locking systems.
The physical forces involved in opening a door thousands of times a week can lead to component flex. This model mitigates such risks through a rigid case design that prevents misalignment of the internal tumblers and gears. The zinc-plated finish acts as a primary defence against oxidation and corrosion, preserving the structural integrity of the metal even when exposed to fluctuating humidity or changing environmental temperatures.
Operational Workflow for Daily Security
Interacting with this nightlatch is an intuitive experience designed to be frictionless for the end user. When a person approaches the door from the outside, they turn the key in the cylinder to retract the latch. Once the door closes, the latchbolt engages automatically into the striking plate, effectively deadlocking the door to maintain a secure boundary.
From the inside, the experience is prioritised for safety and rapid egress. The lever handle is linked directly to the internal release mechanism, allowing for an unrestricted exit during an emergency. This interaction requires minimal torque, meaning that even in high-stress situations, the exit process remains smooth and failsafe, adhering to the highest standards of safety compliance.
Ergonomics and Safety Compliance
Security hardware should never be a source of physical strain. The design of this latch incorporates ergonomic principles that ensure the handle operation feels balanced and natural. By reducing the physical effort required to operate the door, you minimise the risk of repetitive strain for staff and occupants.
Safety compliance remains a pillar of our design philosophy. This item is fully CE marked and tested to EN12209 standards, confirming it meets rigorous quality and safety benchmarks. In commercial settings, using compliant hardware is not just a recommendation but a vital aspect of building management, ensuring that every door functions as a reliable link in your overall fire and security strategy.
Commercial ROI and Long Term Value
Investing in premium hardware such as this modular system provides a significant return on investment over the lifecycle of the building. Cheaper alternatives often require frequent maintenance or complete replacement within a few years due to part failure. By selecting this durable unit, you reduce the long term cost of ownership through extended service intervals and fewer repairs.
Protecting your assets is another key benefit of high-quality locking mechanisms. The automatic deadlocking feature ensures that your premises are always secured the moment a door is pulled shut. This removes the reliance on manual locking, effectively eliminating the risk of human error and reducing the potential for unauthorised access to your valuable inventory or confidential records.
Technical Specifications
| Feature | Specification |
|---|---|
| Case Height | 150mm |
| Case Depth | 74mm |
| Backset | 50mm |
| Faceplate Dimensions | 225mm x 22mm |
| Finish | Zinc Plated |
| Compliance | CE Marked and EN12209 tested |
| Compatibility | Electric strikes and standard lever handles |
Applications Across Diverse Sectors
The versatility of this product makes it a preferred choice for various industries. Its ability to integrate with electric strikes means it can be incorporated into access control systems for modern commercial offices. In the healthcare sector, its robustness ensures that critical zones remain accessible to staff while meeting the necessary security protocols for sensitive areas.
For educational facilities, the durability of the latch is essential for managing the movement of large groups of students throughout the day. It stands as a reliable, maintenance-light solution that allows administrators to focus on operations rather than door repairs. Whether you are refurbishing a heritage building or fitting out a new commercial space, this equipment provides the necessary security and reliability.
Why Professional Installation Matters
While the hardware is designed for straightforward installation, the longevity of any lockcase is directly tied to the precision of its mounting. We always recommend that these items be installed by qualified professionals who understand the tolerances required for the striking plate and cylinder mounting. Because the cylinder and accessories bolt through the lockcase, a secure fit is created that adds significant strength to the entire door assembly.
Important Note Regarding Your Purchase
Please be advised that all cylinders and associated accessories are sold separately. Ensure you have the correct compatible components ready for your installation to avoid unnecessary delays.
Expert Support for Your Hardware Needs
Selecting the right security components can be complex given the variety of door styles and regulatory requirements. If you are not sure if this Assa lockcase is right for your requirements please contact our friendly team today. Our experts possess deep technical knowledge and are ready to assist you in making the perfect choice for your specific door configurations and security objectives. Let us help you secure your space with high-quality, durable solutions that stand the test of time.
Specification
| Manufacturer | Assa |
|---|---|
| Finish | Zinc |
| Lock Type | Mortice Nightlatch |
| Lock Operation | Scandinavian Cylinder |
| Lock Backset | 50mm |
| Follower Size (mm) | 8 |
| Faceplate Width | 22mm |
| Environmental Suitability | All |
| Door Material Suitability | Wood |
| Forend Finish | Zinc Plated |