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Union/Marston FB4 Slamlock

The FB4 Slamlock is a surface mounted lock used by the London Fire Brigade on doors where emergency services may require access. The lock is operated by key from the outside and knob from the inside.

Our Price:  £84.50

Part Number:  2291
Brand:  Union


Product Dimensions

  • Backset - 45mm
  • Width - 20mm
  • Height - 79mm
  • Depth - 110mm
  • Bolt throw - 27mm

Product Features

  • Keys are not included but are available separately
  • Locks are handed. Please see Handing Chart below
  • Only available in Grey finish

Product Operation

  • Latchbolt is operated by key from the outside and knob on the inside
 Standing Inside Door Hinged Door Opens   Lock Required
Right  In Right Hand -  Open In
Left  In Left Hand - Open In 
Right  Out Right Hand -  Open Out
 Left   Out Left Hand -  Open Out 


When will my order be delivered?

For Standard UK Mainland, orders are usually delivered within 3 Days and on the next working day for Next Day.

If you require expedited delivery to UK Mainland addresses, we also offer a  Before 10:00 and a Before 12:00 Option. See our Delivery & Returns Policy for more information.

Orders to the Republic of Ireland, Northern Ireland, Scottish Isles, Scottish Highlands, Guernsey and Jersey are delivered within 2 - 5 days.  

Orders are subject to stock

How much will I pay for delivery?

Standard Delivery to UK Mainland is charged at £4.95 for orders under £100 and next Day Delivery is charged at £6.95. Orders over £100 qualify for free Standard Delivery.

Deliveries to the following destinations is charged at £16.50 for orders under £150 and is free for orders over £150.

Republic of Ireland, Northern Ireland, Scottish Isles, Scottish Highlands, Jersey & Guernsey. 

Items are delivered by a reputable courier service which means they are fully trackable and require a signature upon delivery. This is our preferred method as we can guarantee that  you will receive your items within a specific time frame and vastly reduces the risk of items being lost in transit.  Note: We do not profit from our postage and packaging costs,  In fact, postage costs are subsidised by Online Lock and Safe Centre.

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