What’s the difference between surface bolts and flush bolts?

Surface bolts are mounted visibly on the door face, while flush bolts are recessed into the door edge for a neat, concealed finish.

When should I use straight vs cranked surface bolts?

Straight bolts suit flat frames with aligned keeps, whereas cranked (necked) bolts are offset to reach flush keeps on rebated frames.

Where are door bolts fitted on double doors?

Typically on the inactive (slave) leaf — fitted at the top and/or bottom — so the active leaf can operate and latch normally.

Do flush bolts come in different end profiles?

Yes. Carlisle Brass offers square-end and radius-end faceplates to match your routing preference and aesthetic.

Are Carlisle Brass door bolts suitable for internal timber doors?

Yes. Both surface and flush models are designed for internal timber doors and window casements.

Carlisle Brass Door Bolts

Q: Which finishes match common interior hardware?

Polished Brass, Satin Brass, Antique Brass, Matt Bronze, Matt Black, Polished Chrome, Satin Chrome, Satin Stainless and Polished Stainless finishes are all available.

Carlisle Brass Door Bolts – surface & flush options for internal doors

Carlisle Brass Door Bolts provide neat, dependable locking for interior joinery. Choose surface bolts (straight or cranked) for quick, visible fitting on the door face, or flush bolts (lever or push-button) recessed into the door edge for a clean, concealed finish. Match finishes with your door handles and hinges for a cohesive architectural look throughout your space.

What are door bolts?

Door bolts are simple, reliable devices that slide a bolt into a keep to hold a door or window leaf closed. They’re commonly used on the inactive leaf of double doors, privacy doors, and internal casements — providing both security and stability.

Surface bolts: straight vs cranked (necked)

Straight surface bolts – mount vertically or horizontally on flat frames where the bolt and keep align perfectly.
Cranked (necked) surface bolts – feature an offset neck that bridges a rebate or reaches a flush keep for smooth alignment on rebated frames.

Flush bolts: profiles & operation

Lever flush bolts – manually operated and fitted to the top and/or bottom of the inactive leaf for secure closure.
Push-button flush bolts – compact, spring-loaded action (such as the AA79 style) for a tidy, modern detail.
Faceplate ends – choose between square or radius ends to suit your routing style and door design.

Finishes for a cohesive look

Our range includes Polished Brass, Satin Brass, Antique Brass, Matt Bronze, Matt Black, Polished Chrome, Satin Chrome, Satin Stainless Steel and Polished Stainless Steel — ideal for matching with your existing Carlisle Brass hardware.

Why choose Carlisle Brass door bolts?

Discreet or statement – choose between concealed flush bolts or traditional surface bolts.
Secure & stable – keeps the slave leaf firm and enhances the feel of the active door.
Quick to install – surface bolts require no morticing; flush bolts sit cleanly in the edge for a seamless finish.

If you can’t find the exact size or style you’re after, take a look at our full collection of door viewers for additional options and matching finishes.

Supplied by Trade Door Handles — trusted UK supplier of architectural ironmongery since 1976, offering nationwide next-day delivery.