Lever Action Flush Bolt 20 x 457mm Radius

The 457mm Radius Lever Action Flush Bolt is a premier architectural solution engineered for extra-tall doors, grand entrances, and high-ceilinged spaces. At 457mm (18 inches) in length, this 457mm Radius Lever Action Flush Bolt provides a commanding presence and an exceptional functional reach that is essential for modern doors exceeding heights of 2.4m (8ft) or 2.7m (9ft).

The “Radius” designation refers to the precision-rounded ends of the faceplate. This is a critical design feature for professional joiners and manufacturers utilizing CNC machinery or hand routers. The radius profile allows the hardware to be dropped into a routed mortice in a single pass, eliminating the need for manual squaring with a chisel—drastically reducing installation time while ensuring a factory-perfect fit.

Technical Specifications of 457mm radius lever action flush bolt

Forged for maximum structural integrity, these 457mm radius lever action flush bolt offer a smooth, tactile “flick” action and a secure, vibration-free lock once engaged.

Design & Installation Advantages

• Optimized Reach for Grand Openings: On oversized doors, a standard-length bolt can be physically unreachable without assistance. The 457mm length brings the operating lever down to a natural, comfortable height, allowing users to secure the top of a grand entrance door easily and safely.

• Rapid “Drop-In” Installation: The radius profile is the industry favorite for high-efficiency projects. By using a standard 20mm router bit, a perfect mortice can be created in seconds. This ensures the hardware sits perfectly flush without the jagged edges or gaps often caused by manual hand-tooling.

• Exceptional Compression & Leverage: The extended internal lever mechanism provides a significant mechanical advantage. This allows the bolt to be engaged even against the resistance of high-performance acoustic or heavy-duty weather seals, ensuring a weather-tight and rattle-free closure.

• Maximum Structural Reinforcement: An 18-inch bolt body provides a massive anchoring surface area. This prevents the “slave leaf” of a double door from bowing or vibrating, even when subjected to high-wind coastal pressures or the heavy traffic of a commercial environment.

Primary Applications

1. High-Ceiling Luxury Entrances: The gold standard for 2.4m+ (8ft+) front or rear double doors in high-end residential estates.

2. Modern Gallery & Museum Partitions: Ideal for oversized internal doors where a minimalist, “hidden” aesthetic must be maintained alongside heavy-duty security.

3. High-STC Acoustic Doors: Provides the necessary vertical pressure to keep heavy sound-proof doors tightly compressed against their seals to prevent noise leakage.

4. Executive Boardrooms: Frequently specified for full-height office partitions where professional-grade, discreet locking hardware is required.

Professional Installation Tip: Mastering the Long-Span Mortice

With a 457mm radius lever action flush bolt , the accuracy of the routed channel is paramount to ensure the long lever mechanism operates without friction or binding.

• Use a Dedicated Routing Jig: For a mortice of this length (18 inches), a routing jig is highly recommended. This ensures the channel remains perfectly straight and the depth is consistent across the entire span, preventing the metal body from “flexing” when screwed in.

• Pair with a Dust-Proof Floor Socket: For the bottom 457mm radius lever action flush bolt , always specify a spring-loaded dust-proof floor socket. Debris is the primary cause of bolt failure; a protected socket ensures the bolt always reaches its full 25mm throw for maximum security.

• Drill Deep Pilot Holes: When installing into premium hardwoods like Oak, Walnut, or Iroko, drill straight pilot holes for the full length of the fixing screws. This prevents the screws from shearing or the door timber from splitting near the leading edge.

• Verify Throw Clearance: Before final fixing, ensure the head frame or floor socket is deep enough to accommodate the full bolt throw. If the bolt “bottoms out” before the lever is fully flipped, it will strain the internal pivot, eventually leading to mechanical failure.

This 20 x 457mm radius lever action flush bolt with radius forends is designed for strength, durability, and smooth operation. Perfect for securing the inactive leaf of double doors, 457mm radius lever action flush bolt provides reliable fastening by locking the door securely into the frame or floor. The lever action makes the bolt easy to use, allowing it to slide firmly into position with a simple hand movement. The longer 457mm size offers extra holding power and stability, making it ideal for larger or heavier doors that need strong support.

With its radius forends, this 457mm radius lever action flush bolt provides a neat finish, ensuring it sits cleanly within the door edge without sharp corners. Because it fits flush, it keeps a tidy appearance and eliminates protruding parts, improving both safety and style. Built from durable materials, it is strong enough for regular use in homes, offices, or commercial spaces. Installation is straightforward, and once in place, it needs little upkeep while continuing to perform effectively over time. Combining strength, ease of use, and a clean design, this lever action flush bolt is a reliable choice for long-lasting door security.