+++ Save online price advantage now +++

ABUS BSB 550 bottom strike plate

Extension for FOS 550 / FOS 550 A

  • For window locks / bar locks FOS 550 and FOS 550A
  • Sturdy bottom anchoring
  • Ground socket and transom plate included


incl. 19% VAT, free delivery**




Your ordered goods arrive safely and reliably at the agreed place of delivery.



All accessories and care items are delivered safely and correctly.



The warranty for your accessory product lasts for 2 years.

Product Information

Increased security for the ABUS FOS 550 bar lock

The ABUS BSB550 bottom strike plate is an optional accessory for the ABUS FOS 550 or FOS 550A window bar lock, which is used to secure balcony and patio doors up to 3.10 m high.

The striking plate allows the ABUS FOS550 window lock to be attached to the floor.

It can be used if there is a gap of 7 to 22 mm between the bottom edge of the door and the floor, while a gap of at least 2 mm must be maintained under the transom plate. Please note that a bar lock and bar set are required for double sashed windows and doors without positioning posts, as the window sashes will interlock. However, if there is a positioning post, two bar locks and two bar sets will be required. In the case of double sash windows, a minimum distance of 58 mm from gear centre to gear centre is necessary.

Important accessories for window and door security

The ABUS BSB 550 utilises VdS-approved and DIN-tested technology to ensure break-in protection; this can be seen in window bar locks FOS550 and FOS550A with their pressure resistance of over one tonne per attachment point. The bolt bars with interlocking mechanism then click into the striking plate, and the lock is locked using the handle of the window/door. The bottom strike plate can be used in tight spaces, i.e. if the height of the window frame below the window sash is less than 23 mm. The striking plates provided are only suitable up to a distance of 97 mm. The ABUS DSB 550 double striking plate is used to fasten the bar lock on double-sashed windows. The bars come in a variety of lengths.

Similar products

from 196.99from 196.99

incl. 19% VAT, plus shipping

from 111.99from 111.99

incl. 19% VAT, plus shipping

from 123.98from 123.98

incl. 19% VAT, plus shipping

from 32.99from 32.99

incl. 19% VAT, plus shipping

Customer reviews
Jack’s Point, Otago, New Zealand
Residential building
Jack’s PointOtago, New Zealand
uPVC-alu windows and doors for a passive house

“windows24.com brought windows and doors with amazing quality to our project. The products are well-built and certified for passive house values.”

Heathmont, Melbourne, Australia
Residential building
HeathmontMelbourne, Australia
Composite windows and doors for a passive house

“We spent more than a year searching for a window manufacturer with high product quality and maximum design flexibility. At windows24.com we found the perfect solution for us.”

Cornwallis, Auckland, New Zealand
Residential building
CornwallisAuckland, New Zealand
uPVC windows and a sliding door for high wind zone

“Our architect recommended windows24.com to us. Their German-based window expert team was very helpful in finalising details, organising transport and training my onsite-builder.”

Private house Massachusetts
Residential building
Private houseMassachusetts, USA
uPVC windows

“windows24.com was a great partner for constructing our house. With their help we reached highest quality in terms of design and isolation.”

Did this product description help you?
(21 ratings , Ø 3.9)
to top