Sash Fasteners

Aged Brass Fitch Fastener, from our current range.

What is a sash fastener?

A sash fastener locks the two sashes of a sliding sash window together where they meet in the middle, known as the meeting rail, pulling them tightly closed and preventing the window being opened from outside. The best-known type is the Fitch fastener, a simple pivoting lever that has remained largely unchanged in design for well over a century, though quadrant and hook-style fasteners are also used, often chosen for their appearance rather than any functional difference.

A sash fastener secures the window, but it is the separate sash lift that provides something to grip when raising or lowering the sash itself.

Where sash fasteners are used

• Sliding sash windows – fitted at the meeting rail where the upper and lower sashes overlap, the standard locking method
• Period properties – sash fasteners are one of the most recognisable details of a Georgian or Victorian sash window
• Security upgrades – locking sash fasteners are sometimes specified to meet insurance requirements

Choosing the right sash fastener

A few practical points are worth checking before you buy:

• Style – Fitch, quadrant and hook designs are all functionally similar; choice is largely down to appearance
• Locking option – some sash fasteners include a key-locking function for extra security
• Meeting rail thickness – check the fastener suits the thickness of your sash meeting rails
• Finish – see our Hardware Finishes Guide to match your sash lifts

Related products

Browse our current range in Sash Window Furniture, or see the related Sash Lifts guide.

Frequently asked questions

What is a Fitch fastener?

A Fitch fastener is the classic pivoting lever fastener used to lock the two sashes of a sliding sash window together at the meeting rail, one of the most traditional and widely used sash fastener designs.

Can sash fasteners be locked with a key?

Some sash fastener designs include a key-locking function for extra security, in addition to the standard pivoting catch.

Can I fit a sash fastener myself?

Yes, most sash fasteners can be fitted with basic tools once the correct position on the meeting rail has been marked out.

Back to the Window Furniture Guide, or explore the full Knowledge Centre.