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Carlisle Brass Bulb End Casement Fastener

Brass, Polished Chrome, Satin Chrome or Florentine Bronze

  • Solid brass
  • Hook or mortice plate
  • Traditional styling
  • Chrome plated finishes

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The Carlisle Brass WF11 or WF16 bulb end casement fastener is a popular choice in traditional interiors and the Carlisle version is available in polished and lacquered brass, polished chrome, satin chrome or florentine bronze. 

Modern Weather Sealed Windows

The hook & mortice plate version of the Carlisle Brass bulb end fastener (WF11) is suitable for windows with a weather seal gap of up to 5mm between the window and frame. If you have a window without a visible weather seal gap, the mortice plate only version (WF16) is more suitable.

Matching Casement Stays

Typically the bulb end fastener will be used with the bulb end stay; however it can be used with any one of the window stays we sell. Often it will be used with a sliding window stay or the plain Victorian stay. For added security one of the stay pins can be replaced with a locking pin, since the fastener itself is non-locking.



  • Delivery: Usually from stock or within 2 to 3 days
  • Finish warranty: 5 years, please refer to finishes guide
  • Finish: Polished brass, polished chrome, satin chrome or florentine bronze
  • Material: Solid brass
  • Mechanical warranty: 5 years, in domestic situation
  • Operation: Mortice plate or Hook plate, weather stripped windows (WF11) or standard windows (WF16)
  • Packaging: Sold individually c/w mortice & hook plate or mortice plate only
  • Size: 98mm