Offset uPVC Window Espag Lock Mechanism  – DéDannan Door and Window Parts Ireland

DéDannan Door & Window Parts

DéDannan Door & Window Parts

Mechanism Length

250mm, 400mm, 600mm, 800mm, 1000mm, 1200mm


20mm, 22mm, 25mm

Offset uPVC Window Espag Lock Mechanism

250mm 400mm 600mm 800mm 1000mm 1200mm


An offset window lock locking mechanism is just that, the gearbox at the back of the mechanism is to one side or along the edge of the backplate and no in the middle (like the inline).  An espag is a rod that goes into the euro groove in PVC windows, sometimes called a locking rod or locking track.

A standard offset U Rail espag locking mechanism. An espagnolette multipoint UPVC window lock is the gearing part inside a window that a spindle drive handle operates. This offset mushroom bolt espagnolette is designed for profiles with or without a euro groove and can be used on Aluminium, Timber, and UPVC window systems.  These mechanisms can be fitted to side or top hung windows.


    • 16mm faceplate
    • 20mm/22mm/25mm backset
    • 7mm spindle
    • 8mm mushroom cam height
Important: Offset mechanisms coming out of old PVC windows, say old Munster joinery windows will not be the same as the new ones, we can still get these by special order if you would like, so please use the contact us button if you require them ordered, but the new ones will fit with a little maneuvering and patience. If you need any advice please contact us. We usually recommend emailing us an image of your old lock if you are not sure. Please Note:  The locking mechanism we supply may slightly differ from the image shown here.

Please check your replacement window locks ‘Backset’, this is the distance from the front of the lock to the center of the spindle as shown here.  This is to ensure your new window lock will fit into the position of the old one, however, if you cannot get the exact match it is possible to open up the hole on the frame by 1-2mm with a drill.  It is also advisable to ensure you order the right length window espag for your window. This window locking mechanism is also suitable for most PVC windows, it is also suitable for Munster Joinery Window Repairs.  Do you need mechanism keeps or receivers?  You can choose from our window lock receivers here.

im looking for where can i buy This is a 14mm Slim / Narrow Track Rail near me online

Click HERE for the returns form.  This MUST be filled out and all returns must come with these returns for, otherwise, we cannot accept them,

If you have queries on any of our products or if the part you require is not on our site please use our CONTACT FORM to send us a picture or part number of the part you need, we will get back to you and get you sorted ASAP.

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Mechanism Length

250mm, 400mm, 600mm, 800mm, 1000mm, 1200mm


20mm, 22mm, 25mm

5 reviews for Offset uPVC Window Espag Lock Mechanism 

Based on 5 reviews
5 star
4 star
3 star
2 star
1 star
  1. Brendan Murphy (verified owner)

    Excellent service, parts correct and received within specified time

  2. Niall (verified owner)

    Perfect replacement for my broken Avocet one, no adjustments needed.

  3. Derek (verified owner)

    Good quality

  4. Anonymous (verified owner)

    Good product reasonable price.

  5. Anonymous (verified owner)

    Had to finesse the keepers a bit, but it works fine, would order again for other multipoint locks

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(5 customer reviews)