The 102mm Heavy Duty Tubular Deadbolt is designed to solve specific architectural challenges where standard 64mm or 76mm locks fall short. A 102mm (4-inch) backset is typically required for doors with wide stiles or decorative moldings, ensuring the thumbturn or key is positioned centrally and aesthetically. By extending the reach of the bolt, this hardware allows for a more traditional “centered” look on large-format timber doors without sacrificing the security of a modern, hardened-steel mechanism.

Complete with Satin Stainless Steel (SSS) forends, this 102mm Heavy Duty Tubular Deadbolt is as visually refined as it is physically robust. The extended tubular body houses a heavy-duty spring-free mechanism, meaning the bolt stays firmly in the locked or unlocked position until manually turned, providing a reliable secondary locking point for any internal or external door.

Why the 102mm Heavy Duty Deadbolt is the Professional Choice

Extended 102mm Backset: The primary advantage of 102mm Heavy Duty Tubular Deadbolt is its 4-inch reach, which places the handle or turn further away from the door edge. This prevents “knuckle-clash” on deep door frames and aligns perfectly with large-scale architectural door designs.
Hardened Steel Bolt: The internal bolt is forged from high-tensile steel, designed to resist hacksawing and physical tampering, providing a formidable barrier against forced entry.
Grade 304 SSS Forends: The visible faceplates and strike plates are finished in high-quality Satin Stainless Steel. This ensures the hardware is resistant to corrosion and matches other modern SS304 door furniture.
Reinforced Internal Mechanism: Unlike budget tubular bolts, the “Heavy Duty” internal components are built for high-frequency use, ensuring the bolt throw remains crisp and positive over years of operation.
Universal 5mm/8mm Compatibility: Available to suit both standard residential 5mm spindles and commercial 8mm spindles, making it adaptable for various thumbturn and emergency release sets.
Fire-Rated Integrity: Fully tested for use on timber fire doors (FD30/FD60), ensuring that your high-security lock also complies with essential life-safety regulations.

Technical Specifications of 102mm Heavy Duty Tubular Deadbolt

Feature	Specification
Case Depth	102mm (4 Inches).
Backset	82mm (Distance from edge to spindle center).
Material Build	Hardened Steel Bolt / SS304 Forends.
Lock Type	Heavy-Duty Tubular Deadbolt (Non-Spring).
Bolt Throw	13mm – 16mm (Extended Security).
Finish	Satin Stainless Steel (SSS).

Professional Installation for Long-Backset Hardware

Installing a 102mm Heavy Duty Tubular Deadbolt requires more precision than a standard lock due to the increased depth of the bore-hole.

Deep-Bore Drilling: You will need a long-reach spade bit or auger bit to achieve the 102mm depth. It is critical to keep the drill perfectly level; any deviation over 102mm will result in the spindle being misaligned with the lock’s follower.
Pilot Hole Alignment: Always mark and drill your spindle hole from both sides of the door to meet in the middle. This ensures the wood does not splinter and that the thumbturn sits perfectly square to the 102mm body.
Recessing the SSS Forend: Use a sharp chisel to recess the stainless steel faceplate until it is flush with the door edge. A flush fit is essential for both aesthetic appeal and to prevent the plate from catching on the frame.
Security Strike Fitment: The provided strike plate should be installed with the reinforced “dust box” behind it. This strengthens the timber frame and ensures the deadbolt has a secure, enclosed housing when locked.
Threaded Spindle Security: Ensure your thumbturn’s grub screw is tightened onto the “flat” of the spindle. Given the extra leverage of a 102mm backset, a loose spindle can cause the mechanism to feel “mushy” or unresponsive.

The Ultimate Solution for Architectural Precision

The 102mm Heavy Duty Tubular Deadbolt is more than just a lock; it is a specialized tool for architects and builders who refuse to compromise on door proportions. By providing a secure, hardened-steel locking point with an extended reach,102mm Heavy Duty Tubular Deadbolt allows for the creation of beautiful, functional entrances that are built to last. When your project demands a “strong, secure door lock” with a refined satin finish and an uncompromising backset, this 102mm unit is the definitive choice.

This 102mm Heavy Duty Tubular Deadbolt is built for strength, reliability, and long-lasting performance. Measuring 102mm, it is supplied complete with stainless steel (SSS) forends that provide excellent durability, corrosion resistance, and a clean, modern finish suitable for any door style.

Designed for both residential and commercial use, the deadbolt delivers secure locking and dependable functionality, even with frequent use. Easy to install and engineered for maximum protection, it offers a robust solution to enhance door security while maintaining a professional appearance.