Lever Action Flush Bolt 20 x 305mm

The 305mm Lever Action Flush Bolt is an industrial-strength architectural component designed specifically for full-height doors, grand entrances, and high-ceilinged properties. At 305mm (12 inches) in length, this is one of the most substantial flush bolts available on the market, providing exceptional structural stability and an extended reach that is essential for modern, oversized door designs.

This 305mm Lever Action Flush Bolt is engineered to be fully recessed (morticed) into the edge or face of a door, sitting perfectly flush with the timber surface. Its primary function is to secure the “slave leaf” (the inactive door) of a pair of double doors. By anchoring this door firmly into the head frame and floor, it creates a rock-solid foundation for the “active leaf” to lock into, ensuring a secure, rattle-free closure for the entire assembly.

Technical Specifications of 305mm lever action flush bolt

Built to withstand heavy vertical loads and frequent operation, these bolts feature a precision-machined internal pivot that ensures a smooth, positive “click” every time the lever is engaged.

Design & Security Advantages

• Extended Reach for Tall Doors: In properties with high ceilings, a standard 150mm bolt can be physically difficult to reach. The 305mm length brings the operating lever significantly closer to the user’s natural reach, making it effortless to secure the top of a 2.4m (8ft) door without the need for a step-ladder.

• Superior Structural Anchor: The 12-inch body allows the fixing points to be spread significantly further apart than standard bolts. This creates a much stronger “lever-arm” effect, preventing the door from bowing under wind pressure or vibrating during heavy use.

• High-Leverage Pivot Mechanism: The integrated flip-lever provides an excellent mechanical advantage. This allows the bolt to be engaged or retracted with minimal finger pressure, even if the door has settled slightly or the weather seals are exceptionally tight.

• Invisible Aesthetic Integrity: Because the hardware is morticed deep into the door edge, it remains completely hidden when the doors are closed. This preserves the clean architectural lines of high-end timber or composite doors while providing commercial-grade security.

Primary Applications

1. Grand Entrance Double Doors: The standard specification for oversized front or rear double doors in luxury residential estates and manor houses.

2. Tall Internal French Doors: The ideal choice for “Grand Room” entrances where standard-length bolts would look disproportionately small or be functionally unreachable.

3. Commercial Partitioning: Frequently used in hotel ballrooms, conference centers, or high-end retail spaces where large double doors require a secure, industrial-strength locking point.

4. External Weather-Rated Doors: Provides the necessary vertical compression to keep heavy external doors tightly sealed against weather stripping at both the top and bottom.

Professional Installation Tip: Precision and Alignment

With a 305mm lever action flush bolt of this length, the “throw” is deep, making the alignment of the receiving strike plate the most critical part of the installation.

• The “Top and Bottom” Pair: For any door exceeding 2.1m in height, always install these in pairs—one at the top shooting into the head frame and one at the bottom shooting into the floor. This ensures the door remains vertically plumb and prevents warping.

• Specify a Dust-Proof Floor Socket: For the bottom 305mm bolt, we highly recommend a spring-loaded dust-proof floor socket. Because the bolt is heavy and the throw is deep, even a small amount of debris in a standard floor hole can prevent the bolt from locking fully, compromising your security.

• Mortice Depth Consistency: Ensure the mortice for the 305mm body is consistent in depth along its entire length. If the timber is uneven at the back of the cutout, the long metal body can “flex” when the screws are tightened, which may cause the lever mechanism to bind.

• Pilot Holes in Hardwood: These bolts are often fitted into premium hardwoods like Oak, Iroko, or Walnut. Always drill deep, straight pilot holes for the fixing screws to prevent the door stile from splitting near the leading edge.

This 20 x 305mm lever action flush bolt with radius forends is designed for strength, reliability, and ease of use. 305mm lever action flush bolt 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 305mm 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 305mm lever action flush bolt requires little maintenance while continuing to perform effectively over time. Its longer 305mm size adds stability and security, helping to keep doors aligned and firmly held in place. Functional, neat, and dependable, this 305mm lever action flush bolt is a practical addition to any door security setup.