Lever action flush bolt – 20 x 150mm

To provide a secure and seamless locking solution for pairs of doors, the 150mm Lever Action Flush Bolt is the professional choice for architectural joinery. Engineered to be recessed into the edge or face of the inactive “slave” leaf, this hardware provides a robust vertical locking point into the head or floor, ensuring that double doors remain perfectly aligned and secure when closed.

In modern door specification, the 150mm Lever Action Flush Bolt is the preferred alternative to traditional slide-action bolts. Unlike slide bolts, which can be difficult to operate and prone to sticking, the lever-action mechanism uses mechanical leverage to throw and retract the bolt. A simple flip of the small integrated lever provides a smooth, positive movement, making it an ideal choice for high-end residential projects, commercial office suites, and public buildings.

With a slim 20mm width, this 150mm Lever Action Flush Bolt is designed to fit discreetly within the thickness of the door leaf. When retracted, the hardware sits completely flush with the timber surface, preventing any interference with the primary door’s operation. Forged from Grade 304 Stainless Steel (SS304), it offers the high tensile strength required to secure heavy solid-core doors while maintaining a refined, modern aesthetic.

Why the 150mm Lever Action Bolt is the Industry Standard

• Mechanical Lever Advantage: The internal linkage converts a small movement of the lever into a powerful vertical throw, ensuring the bolt engages deeply into the strike plate even if the door has minor alignment issues.

• Seamless Flush Mounting: Once morticed into the door, the 150mm Lever Action Flush Bolt creates a clean, snag-free edge. This is essential for rebated double doors where a protruding bolt would prevent the doors from closing correctly.

• Grade 304 Stainless Steel Build: Naturally resistant to corrosion and wear, the SS304 construction ensures the lever mechanism remains smooth and the finish stays pristine in both internal and external applications.

• Standard 150mm Length: The 6-inch (150mm) length is the “universal” size for architectural flush bolts, providing the perfect balance between structural stability and ease of installation.

• Deep Bolt Throw: Typically featuring a 15mm to 20mm throw, this bolt provides a significant mechanical link between the door and the frame (or floor), resisting forced entry and wind pressure.

• Hygienic Satin Finish: The Satin Stainless Steel (SSS) finish is easy to clean and matches a wide range of modern lever handles, hinges, and pull bars.

Technical Specifications of 150mm Lever Action Flush Bolt

Professional Installation for Double Doors

A flush bolt is only as effective as the precision of its mortice. To ensure the 150mm Lever Action Flush Bolt operates silently and securely, follow these professional guidelines:

1. Precision Morticing: Use a sharp chisel or a dedicated router jig to create the 150mm x 20mm housing. The depth must be exact; if the bolt sits too proud, it will catch on the opposite door. If it sits too deep, the lever may be difficult to flip.

2. Top and Bottom Placement: For maximum security on external double doors, install one 150mm Lever Action Flush Bolt at the top (into the head of the frame) and one at the bottom (into the floor or threshold).

3. Strike Plate Alignment: Once the bolt is installed in the door, throw the lever to mark the exact position on the frame or floor. Use the provided strike plate to protect the timber or masonry from wear.

4. Clearance Check: Ensure there is a 2mm gap between the bolt head and the strike plate when retracted. This prevents the bolt from “dragging” on the floor or frame as the door is opened.

5. Dry Lubrication: Every 12 months, apply a small amount of dry PTFE spray to the internal lever linkage. Avoid heavy grease, as it can attract sawdust inside the mortice and cause the lever to become stiff.

The Definitive Finish for Professional Joinery

The 150mm Lever Action Flush Bolt is a critical component for anyone looking to achieve a high-end, functional finish on double doors. It provides the hidden strength required to secure the inactive leaf while offering the effortless operability that modern users expect. By choosing a precision-engineered 20mm x 150mm bolt, you are investing in hardware that enhances both the security and the architectural value of the project.

This 20 x 150mm lever action flush bolt is a strong and practical choice for securing double doors or secondary doors. Designed to fit neatly into the edge of the door, it provides extra fastening without affecting the overall style. The lever action design makes it simple to operate, as the bolt can be locked or released with a quick movement, offering both convenience and reliability. With its sturdy construction and compact size, it is suitable for use in homes, offices, and commercial buildings where dependable security is required.

The flush fitting design keeps the bolt discreet while also ensuring smooth performance. Because 150mm Lever Action Flush Bolt sits inside the door edge, there are no protruding parts, which gives a neat and safe finish. Easy to install and requiring minimal upkeep, this lever action flush bolt is built to last, providing long-term service without hassle. It helps keep doors stable, secure, and properly aligned, especially in busy areas where strength and durability are important. This makes it an ideal solution for anyone needing a dependable door security accessory.