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PAR-21EUS-PB-76-DL
Union Strongbolt Euro Deadlock J21EUS Brass 76mm
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Union Strongbolt J21EUS Brass 76mm Euro Deadlock CE Marked
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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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£16.79
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£13.99
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Description
Reliable Timber Door Security with the Union Strongbolt Euro Deadlock
Securing commercial premises and residential properties often comes with tricky carpentry challenges. When replacing older locks or fitting new timber doors, joiners and estate managers regularly encounter weak mortice cutouts, misaligned frames, and security hardware that demands extensive chisel work. Poorly fitted deadlocks not only leave timber edges bruised and vulnerable, but they also compromise physical resistance against forced entry. For property owners managing fire doors, standard commercial locks often fail to meet strict UK building regulations, leaving escape routes exposed to safety compliance risks.
The Union Strongbolt Euro Deadlock J21EUS Brass 76mm provides a dependable, highly engineered solution tailored for British timber doors. Built around the industry-recognised Strongbolt mortice footprint, this robust lock installs effortlessly into common UK door cutouts without demanding excessive woodwork or spoiling the face of the door. Featuring a smooth euro profile cylinder aperture, this lock gives facilities managers and homeowners the flexibility to integrate modern master-keyed suites, thumbturns, or high-security cylinders with complete confidence.
Manufactured to British Standard BS EN 12209 and carrying prestigious Certifire approval, the Union Strongbolt J21EUS delivers proven peace of mind. Its red powder-coated steel casing resists corrosion within the mortice cavity, while the polished brass forend and matching strike plate present an elegant aesthetic for heritage, residential, and commercial settings. Whether installed on external entrance doors or internal safety barriers, this lock ensures exceptional strength, reliable everyday operation, and total fire safety compliance across your estate.
Key Security Architecture and Engineering Features
Resilient Anti-Saw Deadbolt Protection
Physical door attacks often involve hacksaws targeting the space between the door and the frame. The Union Strongbolt Euro Deadlock J21EUS Brass 76mm incorporates hardened steel rollers internally within its 14mm throw deadbolt. When a blade contacts the deadbolt, these internal rollers rotate freely, preventing the saw teeth from gripping or cutting through the solid metal structure.
Chamfered Bolt Against Side Load Pressure
Crowbars and jemmies subject mortice locks to extreme lateral force. This lock uses an advanced chamfered bolt profile that redirects side load pressure, allowing the deadbolt to withstand aggressive sideways force without warping or jamming inside the strike pocket. This clever geometry keeps doors firmly locked under heavy attempted breaches.
Streamlined Carpenter-Friendly Installation
Fitting replacement mortice hardware can be time-consuming when forends require square chisel work. The Strongbolt casing features rounded radius corners on its inner forend, allowing quick installation with modern timber routers. Its standardised casing matches common UK footprints, reducing timber removal and preserving structural door core strength.
Certified Fire Safety Integrity
Maintaining legal fire separation is essential in all multi-occupancy and commercial environments. This mortice deadlock is fully Certifire approved and CE marked, having undergone rigorous furnace testing for 30-minute and 60-minute timber fire door assemblies. When paired with suitable intumescent wraps, it maintains door integrity and restricts smoke passage.
Step-by-Step Installation and Operational Process
Stage 1 Timber Preparation and Morticing
Mark the door edge carefully to position the lock case at your chosen height. The 81mm total case depth requires an accurate mortice pocket that comfortably houses the red powder-coated steel case. Ensure the 57mm backset aligns cleanly on both face sides of timber doors up to 54mm thick, leaving the external door faces smooth and undamaged.
Stage 2 Euro Profile Cylinder Fitting
Route or drill the euro profile keyhole cleanly through both sides of the timber leaf. Slide your chosen euro profile cylinder through the lock body, aligning the central fixing hole. Secure the cylinder using the standard retaining screw through the forend, ensuring the cylinder cam rotates smoothly without binding against the interior mechanism.
Stage 3 Faceplate and Forend Fixation
Recess the 134mm by 26mm faceplate flush into the timber edge. The radius inner forend seats neatly into routed recesses, saving time on the job. Secure the lock case with wood screws, taking care to check that the brass plated finish aligns seamlessly along the vertical edge of the door leaf.
Stage 4 Strike Plate Alignment and Testing
Cut the strike mortice into the frame rebate and fasten the matching brass strike plate. Turn the key or thumbturn from both sides of the door to confirm the 14mm deadbolt engages effortlessly into the box strike. The chamfered bolt should extend smoothly without dragging, guaranteeing a solid, rattle-free closure.
Detailed Specifications
| Specification | Rating or Standard | Practical Details |
|---|---|---|
| Lock Type | Euro Profile Deadlock | Operated strictly via euro cylinder key or thumbturn without latch functionality |
| Case Dimensions | 81mm Depth (3 Inch) | Case height of 89mm fits common mortice cutouts across UK timber doors |
| Backset Dimension | 57mm Measurement | Distance from forend front to keyhole center accommodates standard escutcheons |
| Deadbolt Throw | 14mm Positive Deadlocking | Chamfered bolt with anti-saw hardened steel roller inserts |
| Faceplate Dimensions | 134mm x 26mm | Polished brass plated finish with radius inner forend for easy routing |
| Door Compatibility | Up to 54mm Door Thickness | Suitable for both left-hand and right-hand hinged timber doors |
| Hardware Standards | BS EN 12209:2003 Certified | Rigorously tested to British and European performance benchmarks |
| Fire Safety Rating | Certifire Approved | Approved for 30-minute and 60-minute timber fire door installations |
| Regulatory Marking | CE Marked | Fully verified for UK commercial and residential architectural specifications |
Professional Fitting and Security Recommendations
To get the best performance from your Union Strongbolt installation, select an appropriate euro profile cylinder that matches your door thickness and security demands. On external doorways, pair this deadlock body with a British Standard TS007 3-star rated cylinder or an approved cylinder and escutcheon combination. This safeguards against lock snapping, cylinder bumping, and drilling attacks.
When installing this lock on designated FD30 or FD60 fire doors, always install manufacturer-approved intumescent encasement kits around the lock case and behind the forend. This intumescent barrier expands under intense heat, protecting the timber mortice cut from fire degradation and keeping building seals intact.
Need Expert Advice on Door Hardware?
If you need help choosing cylinders, checking timber backsets, or confirming fire certificate requirements for your project, Doorfit's architectural ironmongery specialists are always ready to guide you.
Contact Our TeamSpecification
| Manufacturer | Union |
|---|---|
| Finish | Polished Brass |
| Guarantee | 10 Year |
| Lock Type | Mortice Deadlock |
| Lock Operation | Euro Cylinder |
| Lock Backset | 57mm |
| Follower Size (mm) | N/A |
| Faceplate Width | 26mm |
| Environmental Suitability | All |
| Mechanism | 1 Dead Bolt |
| Door Material Suitability | Wood |
| Max Door Thickness (mm) | 54 |
| Forend Finish | Polished Brass |
