Window bar lock FOS550 B EK

FOS550 brown

Universal linkage: You can secure your patio doors and double casement windows reliably with this window bar lock.

All variants for FOS550

Window bar lock, security for patio doors and double casement windows.

Narrowly constructed, quickly mounted: Secure your patio and double doors with this bar lock. The two strong securing points secure at the top and bottom. The lock withstands a pressure of over one tonne at both points. The additional window lock is operated by means of a lockable window handle: If the window is closed, the locking bars are also extended.
  • Made in Germany
Application example - FOS550
Awards & Partners
Test seal Gesamtverband der deutschen Versicherungswirtschaft – Cologne, Germany
VdS anerkannt
Test seal Gesamtverband der deutschen Versicherungswirtschaft – Cologne, Germany

Test seal Ö-Norm – Vienna, Austria
Ö Norm
Test seal Ö-Norm – Vienna, Austria

Awards & Partners


  • VdS and DIN-certified
  • Resists more than one ton static load per securing point
  • Two locking points (top and bottom)
  • The system and the window is locked by the window handle
  • Appropriate bar sets have to be ordered separately
  • Incl. two keys

Operation and use

  • Two-point locking for inward opening windows and patio doors
  • Modular construction system up to 3.10 m, if handle is centred on the frame
  • Also for double windows with or without a rebate, with 7 mm square bolt
  • Dead bolting with quality push-button cylinder
  • Unlocking with the key only necessary after dead bolting
  • Can be supplied keyed alike with a variety of other ABUS products
  • Suitable for all surface materials, such as wood, PVC and aluminium
  • Universal DIN-right and DIN-left mounting


  • Finishes: B, W
  • Length of bars: 75 cm / 118 cm / 150 cm
  • Accessories: Floor strike plate BSB550, strike plate for double casement windows DSB550 B/W, ground socket BH550
  • Alarmed version also available


We have summarised for you which disposal information is important in your country.

Disposal & labelling of packaging
Locking type: key
alarm function: No
Window type: Basement window, Double casement window, Single casement window, Balcony door / patio door
Security Level Home Security: 10
Design: Technical drawing
Technical drawing
colour: brown
door guard: No
Weight: 1462 g
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