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R04 UPVC Locking Window Restrictor

£11.10 Exc Vat £13.32 Inc Vat

In stock

  • Key Locking window restrictor to suit most uPVC

  • Fully concealed restrictor design within the window.
  • Self-engaging upon closure (spring loaded arm).
  • Supplied with 2 bracket pins to accommodate different frames.
  • If in doubt try one restrictor to be certain it will fit your window.
  • Supplied with one key per restrictor (matching)
  • Instructions included along with fixing screws for uPVC.
  • Spare R04 keys available.
  • Typical questions about key locking window restrictors.
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Key Locking Window Restrictor for most uPVC Windows


A key locking window restrictor suitable for most upvc windows fitted with normal double glazing hinges. A little bit of care is needed to install this device and fitting instriuctions are provided. When installed this key locking window restrictor will re-locate to its restricted position each time the window is closed. To disengage the window restrictor and to open the window fully requires the insertion of the key and then sliding the sleeve towards you. The arm can then be flicked away from the bracket pin to disengage. This key locking wndow restrictor is fitted and concealed between the two frames so there are no unsightly attachments affecting the aesthetics of the window. This device is most popular on upvc windows and is provided with two pins to adjust the engagement of the pin and the arm. Some aluminium frames can use this restrictor but please enquire before ordering to be certain.


Important notes:

  • The R04 window restrictor should be positioned to allow an air-gap no greater than 100mm (the size of a childs head).
  • Always try one restrictor first before purchasing for larger quantities.
    R04 does not provide a rigid open stay position.
  • Material: Stainless steel and Zinc Alloy construction.
  • Testing: Resists an impact of 600N outward force under test conditions.
  • Top hung windows require a LH and a RH restrictor. Side hung windows require one restrictor at the bottom of the window. Please consider all risk assessments when fitting these window restrictors to your particular application.

European Deliveries: Suspended from 21st Dec 2020 until further notice..

Coronavirus: Orders are currently being dispatched on time but couriers may take longer to get to you due to issues surrounding Coronavirus. Delivery times quoted cannot be guaranteed.

Hermes Delivery is currently taking between 1 and 5 working days.

If you have received your tracking number via email from Hermes you can check the status here.

If you want to find a Hermes parcel shop use this link here.

* UK deliveries over 15kg in weight will be delivered by DPD.

** Does not include weekend or Bank Holiday delivery days.

Delivery Charges Hermes and DPDHermes TrackingHermes Parcelshops


The following special offer is available to you when you buy the R04 UPVC Window Restrictors. The discount for the special offer will show in the cart if both the R04 UPVC Window Restrictors and the special offer product are added.

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