Lever Action Flush Bolt 20 x 457mm

In architectural ironmongery, the 457mm Lever Action Flush Bolt (18 inches) serves as the versatile “mid-size” option between standard 150mm bolts and full-length 914mm versions. On a standard 2-meter door, the 457mm length positions the operating lever at a perfect ergonomic height—approximately chest-level—while the bolt engages securely into the head of the frame. This removes the need for users to reach to the very top edge of the door, providing a more premium and accessible user experience.

Forged from Grade 304 Stainless Steel (SS304), this 457mm lever action flush bolt features a slim 20mm profile designed for a seamless, flush fit. The lever-action mechanism provides a mechanical advantage, allowing the user to throw the vertical rod with minimal effort, ensuring double doors remain perfectly aligned and resistant to rattling or forced entry.

Why the 457mm Lever Action Bolt is the Professional Choice

• Optimal Ergonomic Reach: The 18-inch (457mm) body brings the flip-lever down from the top of the door to a comfortable operating height, making it ideal for elderly users or those with limited mobility.

   

• Increased Structural Stability: By occupying a larger portion of the door’s meeting stile, the 457mm lever action flush bolt acts as a structural rib, helping to prevent timber “warping” or bowing in centrally heated environments.

• Grade 304 Stainless Steel Build: Premium SS304 construction ensures the faceplate and internal linkage are resistant to corrosion, maintaining a smooth operation even in humid or coastal areas.

• Positive Lever Engagement: The internal gear system is designed with a “detent” that locks the bolt in the up or down position, preventing the rod from dropping due to gravity or door vibrations.

• Architectural Flush Finish: Designed for a neat, recessed installation, the bolt sits level with the door timber, ensuring it does not interfere with the secondary “active” door leaf.

• Hygienic Satin Finish: The Satin Stainless Steel (SSS) finish is hard-wearing, hides fingerprints, and complements modern commercial door hardware.

Technical Specifications of 457mm lever action flush bolt

Professional Installation for 457mm lever action flush bolt

The 457mm length requires a deeper and more precise mortice than a standard small bolt. To ensure a “fit-and-forget” installation, follow these professional steps:

1. Guided Routing: Due to the 18-inch length, using a router with a dedicated flush-bolt jig is highly recommended. This ensures the channel is perfectly straight; even a minor curve in the timber mortice can cause the internal 457mm rod to “bind” and make the lever stiff.

2. Top-Down Orientation: This 457mm lever action flush bolt is primarily used at the top of the door leaf. Measure carefully from the top edge downward to ensure the lever sits at a uniform height across all double-door sets in the building.

3. Strike Plate Depth: Ensure the strike plate in the head of the frame is recessed sufficiently. If the bolt “bottoms out” against the plate before the lever is fully closed, it will put unnecessary stress on the internal linkage.

4. Fixing Screws: Use the provided stainless steel screws. For the strike plate specifically, ensure the screws are at least 30mm long to bite firmly into the head of the door frame.

5. Initial Lubrication: Before final assembly, apply a small amount of dry PTFE lubricant to the pivot points of the lever and the tip of the bolt. This ensures a whisper-quiet operation from day one.

The Standard for Refined Double Door Operation

The 457mm Lever Action Flush Bolt is the ideal choice for projects where user comfort and architectural detail are paramount. It offers a significant upgrade over basic slide bolts, providing the hidden strength and ease of use required for modern residential and commercial interiors. By specifying a 457mm SS304 unit, you ensure your double doors are as functional as they are secure.

This 457mm lever action flush bolt with radius forends is designed for strength, reliability, and ease of use. It is ideal for securing the inactive leaf of double doors or any door that requires extra fastening. The lever handle makes operation smooth and effortless, allowing the bolt to slide securely into position with a simple movement. The radius forends provide a neat and professional finish, ensuring the flush bolt fits neatly into the door edge while maintaining a clean appearance.

Built with durability in mind, this 457mm lever action flush bolt is strong enough to handle daily use in both residential and commercial settings. Because it sits flush within the door, it avoids protruding parts and delivers a safe, tidy, and discreet design. Installation is straightforward, and once fitted, the bolt requires little maintenance while continuing to perform effectively over time. Its longer 457mm size adds stability and security, helping to keep doors aligned and firmly held in place. Functional, neat, and dependable, this lever action flush bolt is a practical addition to any door security setup.