Heavy Duty Tubular Deadbolt 127mm Complete with SSS Forends Strong Secure Door Lock

The 127mm Heavy Duty Tubular Deadbolt is the definitive “long-reach” solution in architectural ironmongery. While standard 64mm or 76mm bolts are the norm for narrow stiles, the 127mm (5-inch) variant is specifically designed for grand entrance doors or period-style internal doors with wide timber sections. This extended backset ensures the thumbturn or key release is positioned away from the door edge, preventing “knuckle-clash” against deep door frames and aligning the hardware with the central axis of wide stiles.

Forged with Satin Stainless Steel (SSS) forends, this 127mm Heavy Duty Tubular Deadbolt combines a refined modern finish with industrial-grade strength. The “Heavy Duty” internal mechanism is built to handle the increased leverage of a longer spindle, ensuring that the bolt throw remains smooth, crisp, and positive over thousands of operations.

Why the 127mm Heavy Duty Tubular Deadbolt is the Professional Choice

• Extra-Long 127mm Case: The 5-inch depth provides an approximate 107mm backset, making it the ideal choice for oversized doors or unique architectural designs where standard hardware looks “crowded” near the edge.

• Hardened Steel Deadbolt: The internal bolt is constructed from high-tensile steel, engineered to resist hacksawing and physical force, providing a robust secondary locking point.

• Grade 304 Stainless Steel Build: The faceplates and strike plates are made from premium SS304 alloy, ensuring they will not rust, pit, or tarnish, even in humid or coastal environments.

• Reinforced Internal Springs: Despite being a deadbolt (non-spring), the internal followers are reinforced to provide a “click-lock” feel, ensuring the bolt stays securely engaged until manually retracted.

• Universal Spindle Compatibility: Designed to work with both 5mm residential thumbturns and 8mm commercial-grade spindles.

• Fire Rated Performance: Fully tested for use on 30-minute and 60-minute timber fire doors (FD30/FD60), ensuring total compliance with safety regulations.

Technical Specifications of 127mm Heavy Duty Tubular Deadbolt

Professional Installation for Long-Reach Hardware

Installing a 127mm Heavy Duty Tubular Deadbolt requires extreme precision due to the depth of the bore-hole.

1. Guided Deep Drilling: You will need a long-reach auger bit to achieve the 127mm depth. It is highly recommended to use a drill guide to ensure the hole remains perfectly level. Any slight angle at the start of the hole will result in a significant misalignment 127mm deep into the timber.

2. Bore Hole Diameter: Ensure the hole is slightly larger (usually 25mm) than the tubular body. This allows for minor adjustments to ensure the spindle follower aligns perfectly with the thumbturn holes drilled from the door faces.

3. Clean Faceplate Mortice: Use a sharp chisel to recess the SSS faceplate until it sits flush. This prevents the metal from catching on the door frame and ensures a high-end architectural finish.

4. Security Strike Installation: Always install the provided “dust box” behind the strike plate. This reinforces the timber frame and provides a secure, enclosed housing that prevents the bolt from being forced through the jamb.

5. Spindle Centering: Given the 107mm backset, ensure your spindle is long enough to pass through the lock and into the thumbturn on both sides. A spindle that is too short can “slip” out of the follower during operation.

Architectural Precision for Grand Entrances

The 127mm Heavy Duty Tubular Deadbolt is more than a lock; it is an architectural necessity for doors that demand a balanced, centered appearance. It provides industrial-grade security with the refined finish of Satin Stainless Steel, making it the perfect choice for high-end residential and commercial projects. When standard lengths are insufficient, this 5-inch deadbolt delivers the reach and reliability your project requires.

This 127mm Heavy Duty Tubular Deadbolt is engineered for maximum strength, durability, and dependable security. Measuring 127mm, it is supplied complete with stainless steel (SSS) forends that offer superior corrosion resistance and a clean, professional finish suitable for a wide range of door styles.

Ideal for both residential and commercial applications, the 127mm Heavy Duty Tubular Deadbolt provides reliable locking performance even under frequent use. Easy to install and built for long-lasting protection, it combines robust construction with practicality and style, ensuring doors remain safe, secure, and visually appealing.