Flush Bolts

(132 products)

Flush Bolts – Concealed, Secure Door Bolts for Double Doors

Flush bolts (also called mortice flush bolts or concealed door bolts) are fitted into the door edge to secure the inactive leaf without visible surface hardware—ideal for double doors, French doors and tall window shutters.

Atlantic Lever Action Flush Bolt 200mm x 25mm - Satin Stainless Steel

Why Choose Flush Bolts?

Concealed, Reliable Locking for Double Doors

Flush bolts—also known as concealed bolts, recessed bolts, or morticed door bolts—are a go-to solution for securing inactive leaves on double doors, French doors, and tall timber, aluminium or composite door sets. They provide hidden locking points at the top and/or bottom edge, keeping doors rigid and aligned. Options include slide-action and lever-action designs, with lengths from 100 mm through 900 mm.

For full project coordination, see Architectural Ironmongery, Accessories, Door Furniture and Window Furniture.

Explore related bolt types in Straight Surface Bolts, Cranked (Necked) Surface Bolts, and Espagnolette Surface Bolts.

Sizes, Finishes & Materials

Selecting the Right Length, Throw & Keep

Choose a flush bolt length that suits your door height—longer bolts give smoother travel and extra reach for tall doors. Standard lengths include 100 mm, 150 mm, 200 mm, 300 mm, 450 mm, 600 mm, and 900 mm. Select a throw length that engages fully into the keep without binding. Keep types include surface edge keeps, mortice strike plates, and floor sockets. Popular UK finishes: Antique Brass, Pewter, Beeswax, Polished Brass, Polished Chrome, Satin Chrome, Satin Nickel, Satin Brass, Matt Black, and 316 stainless steel for high-corrosion resistance. For guidance, visit the contact page.

Frequently Asked Questions

What are flush bolts?

Flush bolts are recessed (morticed) door bolts installed into the door edge to secure the inactive leaf on double doors, giving a concealed, minimalist finish.

Where are flush bolts used?

They are fitted at the top and/or bottom of the inactive leaf on double doors or French sets to stabilise and lock them. Suitable for timber, aluminium and composite doors.

What options are available for coastal or external use?

Marine-grade 316 stainless steel flush bolts and durable powder-coated finishes offer increased corrosion resistance for coastal and external environments.

UK-Wide Supply & Trusted Brands

Flush Bolts for Residential & Commercial Doors

We supply flush bolts suitable for residential, heritage, and light commercial projects, including fire-rated flush bolts, heavy-duty concealed bolts, top and bottom bolts, and 316 marine-grade flush bolts for coastal applications. Our UK distribution covers London, Manchester, Birmingham, Leeds, Glasgow, Edinburgh, Cardiff, Newcastle and Bristol. Coordinate with matching hardware from From The Anvil, Carlisle Brass, Heritage Brass, and Frelan Hardware.