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UNION C-Series 3M50 Detainer Hookbolt


This Union C-Series (formerly known as Chubb) 3M50 5 Detainer Mortice Hook bolt by Union is manufactured in the UK, with a 10 year guarantee. The brass hook bolt clutches lock into frame, and the lock has been fire tested to 60 minutes for timber fire door applications (up to 50mm thickness).


  • Can be master keyed or keyed alike with other detainer mortice locks
  • Suitable for sliding or hinged doors up to 50mm thick
  • Supplied with 2 escutcheons
  • UK Manufactured with 10 Year Guarantee
  • EN1634-1 use on 60 min timber fire doors
  • Formerly known as Chubb

Out of stock


  • Backset: 43mm
  • Case Height: 144mm
  • Case Depth: 70mm
  • Weight: 1.15Kg
  • Finish: Gold
  • Forend Length: 225mm
  • Forend Width: 25mm
  • Guarantee: 10 Year
  • Keys Supplied: 2
  • Pack Quantity: 1
  • Packaging: Boxed
  • Manufacturer Reference: 3M50