Window locks for UPVC
Replacement uPVC Window Locks
Find replacement window lock mechanisms and gearboxes for double glazed windows, including Espag locks, shootbolt gearboxes, keeps and fixings.
Not sure which window lock you need?
Our measuring guide shows you which sizes to check before choosing a replacement window lock.
View the Window Lock Guide ›Shop window locks and parts
Choose your lock type or find the keeps and fixings you need.
Window Lock Info — Quick Guide
Gearboxes for uPVC Windows
A window gearbox is the central part of many three-piece locking systems. In many cases, the gearbox can be replaced on its own if the rods or shootbolts are still in good condition.
To remove it, you will usually need to take out the handle bolts and the screws securing the mechanism.
Full-Length Window Locks
Full-length Espag locks are still used on many windows. Some older mechanisms are no longer made, but suitable alternatives may be available.
Check the backset, overall length and whether the mechanism is offset or inline. Our window lock measuring guide explains what to measure.
Keeps and Screws
Keeps and fixings may be needed when fitting or replacing a window lock. An alternative mechanism may need different keeps or some adjustment, depending on the window.
Need help identifying your lock? Call us on 01204 652211.
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Vitawin Vita Espag Window Lock - Longer Length
Vitawin
£12.74 Inc. VAT£10.62 Ex. VATVitawin Espag Window lock. The Vitawin espag window lock is a great replacment for all of the Vitawin espag range. They are available in 20mm and 22mm backsets.£12.74 Inc. VAT£10.62 Ex. VAT -
Maco MK1 – Drive Gear for Shootbolt System
Maco
£22.81 Inc. VAT£19.01 Ex. VATThe Maco MK1 gearbox mechanis£22.81 Inc. VAT£19.01 Ex. VAT -
£9.71 Inc. VAT£8.09 Ex. VAT -
£19.13 Inc. VAT£15.94 Ex. VAT -
R.A.I.L. Reverse Action INLINE Window Espag by Maco
Maco
£14.51 Inc. VAT£12.09 Ex. VATRAIL Reverse Action In-line Locking Security Espagnolette In-line security espagnolette locking system.£14.51 Inc. VAT£12.09 Ex. VAT -
£9.24 Inc. VAT£7.70 Ex. VAT -
Coldseal Tallon Replacement Window Lock KIT - 1000mm
Maco
£26.92 Inc. VAT£22.43 Ex. VATThis kit is a REPLACEMENT / WORK AROUND for the Tallon window lock that was fitted by Coldseal windows. The original lock is no longer made and this kit has been put together through trial and error...£26.92 Inc. VAT£22.43 Ex. VAT -
Vitawin Shootbolt Window Gearbox Mechanism
Vitawin
£14.39 Inc. VAT£11.99 Ex. VATThis Vitawin shootbolt gearbo£14.39 Inc. VAT£11.99 Ex. VAT -
£6.24 Inc. VAT£5.20 Ex. VAT -
Coldseal Tallon Replacement Window Lock KIT - 800mm
Maco
£25.48 Inc. VAT£21.23 Ex. VATThis kit is a REPLACEMENT / WORK AROUND for the Tallon window lock that was fitted by Coldseal windows. The original lock is no longer made and this kit has been put together through trial and error...£25.48 Inc. VAT£21.23 Ex. VAT -
Mila Tongue Window Lock
Mila
£21.23 Inc. VAT£17.69 Ex. VATMila Tongue espag Window locking mechanism. This lock has been discontinued by the original manufacturer. The one offered on this page is an exact copy and will swap straight over with minimal fuss.£21.23 Inc. VAT£17.69 Ex. VAT -
WMS Avocet U-Rail Window Locking Mechanisms
Avocet
£19.73 Inc. VAT£16.44 Ex. VATWMS Avocet U-Rail Window Locking Mechanisms£19.73 Inc. VAT£16.44 Ex. VAT