Flush Bolts

Flush Door Bolts

Flush bolts are recessed into the edge or face of a door rather than fitted prominently to its surface. This creates a clean finish and helps protect the operating mechanism when the door is closed.They are most commonly fitted to the inactive leaf of double doors. Once the inactive door has been secured using bolts at the top and bottom, the active leaf can close and lock against it.
Our collection includes flush bolts for internal and external door applications, with different sizes, materials and operating styles available. Always check the individual product specification to confirm suitability for your door and installation environment.

Flush Bolts for Double and French Doors

A flush bolt for double doors provides a discreet way to secure the leaf that is opened less frequently. The bolt typically extends into a keep or socket fitted within the head of the frame, threshold or floor.

Double door flush bolts are commonly installed as a pair, with one positioned at the top and another at the bottom of the inactive leaf. This helps prevent movement and creates a stable closing point for the active door.

They can also be used on rebated doors, but the position of the rebate may affect the required bolt dimensions and fitting method. Check that the product is compatible with the door configuration before ordering.

Lever Action Flush Bolts

A lever action flush bolt uses a recessed lever to extend or retract the bolt. The mechanism is easy to operate while the door edge is accessible and sits neatly within the door when installed.

Lever action flush bolts are available with square or radius-ended faceplates to suit different joinery preparations. Choosing the correct faceplate shape is particularly important when replacing an existing bolt, as it can reduce the amount of alteration required.

Frequently Asked Questions

What is a flush bolt?

A flush bolt is a recessed locking mechanism fitted into the edge of a door, designed to secure one leaf of a double door or rebated door while keeping the bolt discreet and out of sight. Flush bolts are available in lever action or slide designs and are suitable for internal and external doors, providing smooth operation and reliable security.

What is the difference between surface bolts and flush bolts?

Surface bolts are mounted on the surface of the door and are visible, whereas flush bolts are recessed into the door edge, giving a cleaner, more discreet finish. Flush bolts are ideal for applications where aesthetics are important, such as French doors or double doors, while surface bolts are often used for heavier-duty or external doors.

How to remove a flush snapped bolt?

If a flush bolt becomes snapped or stuck, first ensure the door is supported. Remove any screws holding the bolt casing in place and gently extract the bolt mechanism. Depending on the damage, you may need to replace the entire flush bolt assembly. For lever action models, carefully disengage the lever before attempting removal. Always follow manufacturer guidelines to avoid damaging the door.

How many flush bolts are needed for double doors?

Typically, double doors require at least two flush bolts - one at the top and one at the bottom of the inactive leaf. This ensures the door is securely fixed and reduces the risk of warping or movement. In some cases, additional bolts may be added for taller doors or heavy-duty applications.