Window locks for UPVC

Window locks for UPVC

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UK Leading Supplier of Window Locks for Double Glazing

  • ✅ Gearboxes available from many suppliers such as Saracen, Maco, Mila and more
  • ✅ UPVC window gearboxes are the main lock part – usually replaced on their own, with rods rarely needed.
  • ✅ Full length window locks are older but still popular – check backset, length and offset for the right fit.
Not sure which size? Our Window Lock Guide makes it simple – check it out here.

The main two types of window lock handle that go on double glazing click below to get information on which lock you need and how it will fit your window.

? Window Lock Info — quick guide

Gearboxes for UPVC Windows

UPVC window gearboxes are the central part of a 3-piece lock and can usually be replaced on their own. Rods or shootbolts rarely need changing, but we stock them if required. The lock is secured with retaining screws and the handle bolts, which must be removed to take it out.

Full Length Window Locks

Older but still popular. Some espag locks are obsolete, though alternatives are available with minor adjustment. Check backset, overall length, and whether it’s offset or inline. See the measuring guide.

Keeps & Screws

All the extras to fit your espag lock or gearbox. Missing screws/keeps can slow the job down. If you’re replacing an obsolete lock, you may need extra keeps/screws to make the alternative fit. Need help? Call 01204 652211.

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  • RAIL Reverse Action INLINE Window Espag by Maco - Longer Lengths

    R.A.I.L. Reverse Action INLINE Window Espag by Maco - Longer Lengths

    Maco

    £19.18 Inc. VAT
    £15.98 Ex. VAT
    RAIL Reverse Action In-line Locking Security Espagnolette by MACO In-line security espagnolette locking system.PLEASE NOTE: Due to postage contraints the 800mm, 1000mm and 1200mm can only be sent via courier and not through the normal mail. Available...
    £19.18 Inc. VAT
    £15.98 Ex. VAT
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  • Coldseal Tallon Replacement Window Lock KIT - 600mm

    Coldseal Tallon Replacement Window Lock KIT - 600mm

    Maco

    £21.52 Inc. VAT
    £17.93 Ex. VAT
    This 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 by our own Service Engineer and will fit...
    £21.52 Inc. VAT
    £17.93 Ex. VAT
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  • Coldseal/ProLinea Shootbolt Espag Window Locking System with No Mushrooms

    Coldseal/ProLinea Shootbolt Espag Window Locking System with No Mushrooms

    Mila

    £12.23 Inc. VAT
    £10.19 Ex. VAT
    Mila ProLinea Shootbolt Espag This locking mechanism is called the ProLinea Series 8.  It is often used as a replacement for the Coldseal window lock that was fitted in Coldseal double glazed windows many years ago.   20mm or 22mm...
    £12.23 Inc. VAT
    £10.19 Ex. VAT
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  • Coldseal Tallon Replacement Window Lock KIT - 400mm

    Coldseal Tallon Replacement Window Lock KIT - 400mm

    Maco

    £17.39 Inc. VAT
    £14.49 Ex. VAT
    This 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 by our own Service Engineer and will fit most Coldseal...
    £17.39 Inc. VAT
    £14.49 Ex. VAT
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  • WMS Avocet U-Rail Window Locking Mechanisms - Longer Lengths

    WMS Avocet U-Rail Window Locking Mechanisms - Longer Lengths

    Avocet

    £24.29 Inc. VAT
    £20.24 Ex. VAT
    WMS Avocet U-Rail Window Locking Mechanisms Available with 20mm or 25mm backset PLEASE NOTE: Due to postage contraints the 800mm, 1000mm, 1200mm can only be sent via courier and not through the normal mail.  800mm 1000mm 1200mm - No Longer...
    £24.29 Inc. VAT
    £20.24 Ex. VAT
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  • Maco MK2 Shootbolt Extensions, PAIR

    Maco MK2 Shootbolt Extensions, PAIR

    Maco

    £11.59 Inc. VAT
    £9.66 Ex. VAT
    Maco MK2 Shootbolt Extensions - supplied as a pair Supplied as a pair Extensions to suit the Maco MK2 casement shootbolt gearboxes. 7.7mm mushroom cam height To choose the correct shootbolts , measure the whole length of your opening window and...
    £11.59 Inc. VAT
    £9.66 Ex. VAT
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  • Trojan Stallion Window Gearbox Replacement

    Trojan Stallion Window Gearbox Replacement

    Windowparts

    £13.48 Inc. VAT
    £11.23 Ex. VAT
    Window Gearbox to replace the Trojan Stallion Lock This is a popular window gearbox which the original manufacturer no longer makes but this replacement should work like for like. Includes cover plate. 22mm Backset. 16mm Faceplate width. 80mm...
    £13.48 Inc. VAT
    £11.23 Ex. VAT
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  • 19mm self tapping screws, pack of 50

    19mm Self-tapping Super Screws - pack of 50

    Handles & Hinges

    £4.08 Inc. VAT
    £3.40 Ex. VAT
    19mm self-tapping screws, ideal for fitting double glazing window hinges and letterboxes Pack of 50 screws
    £4.08 Inc. VAT
    £3.40 Ex. VAT
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  • Roto Window Lock - TSL Espag Version

    Roto Window Lock - TSL Espag Version

    Handles & Hinges

    £20.88 Inc. VAT
    £17.40 Ex. VAT
    This lock is the replacement for the Roto TSL espag window locking system. Please note: All parts longer than 600mm will need to be delivered by courier due to Royal Mail contraints.   Espag Lock Backset Measuring Guide SIMPLE STEPS TO HELP...
    £20.88 Inc. VAT
    £17.40 Ex. VAT
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  • Saracen HS Shootbolt High Security Window Locking Gearbox

    Saracen HS Shootbolt High Security Window Locking Gearbox

    Saracen

    £24.56 Inc. VAT
    £20.47 Ex. VAT
    Discontinued by the manufacturer Gearbox mechanism Only. The Saracen HS Shootbolt system combines strength and durability with exceptional security and performance. The unique combination of a robust central gearbox mechanism  with twin...
    £24.56 Inc. VAT
    £20.47 Ex. VAT
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  • Mila GR Series Window Locking Mechanisms

    Mila GR Series Window Locking Mechanisms

    Mila

    The 3 series  Fearless espagnolette mechanism from Mila is designed to fit standard and reduced depth eurogrooves. It provides smooth operation and effective sealing for all types of casement double glazing windows. This mechanism has been...
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  • Kenrick Sentrilock Window Lock Shootbolt Gearbox

    Kenrick Sentrilock Window Lock Shootbolt Gearbox

    Kenrick

    £23.76 Inc. VAT
    £19.80 Ex. VAT
    Kenrick Sentrilock Replacement gearboxs. An exact replacement for the slimline Kenrick Shootbolt locking system. Faceplate : 110mm x 6mm Gearbox : 110mm x 25mm ***PLEASE NOTE THAT THIS ITEM NO LONGER COMES WITH THE CENTRAL HOOK/TONGUE LOCKING...
    £23.76 Inc. VAT
    £19.80 Ex. VAT
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