Night latch

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A night latch (or night-latch or nightlatch) is a door lock having a sprung bolt that is operated from the exterior side of the door by a key and from the interior (i.e. "secure") side of the door by a knob.[1][2][3]

Night latches are usually rim locks.[4]

Historically, such locks were intended for use at night-time, hence the name.[5] The keyless egress that they offer is a valuable fire safety measure.


  1. ^ "Definition of NIGHT LATCH".
  2. ^ Hasluck, Paul N. (8 February 2011). "The Handyman's Guide: Essential Woodworking Tools and Techniques". Skyhorse Publishing, Inc. – via Google Books.
  3. ^ Mitchell, John Ames (26 September 2018). "Life". Life – via Google Books.
  4. ^ Jones, Tony L. (1 January 2003). "COURT SECURITY: A Guide for Post 9-11 Environments". Charles C Thomas Publisher – via Google Books.
  5. ^ Sturgis, Russell; Davis, Francis A. (23 April 2013). "Sturgis' Illustrated Dictionary of Architecture and Building: An Unabridged Reprint of the 1901-2 Edition". Courier Corporation – via Google Books.