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BS4 Maximum Security Nightlatch - Emergency Escape

In stock
Product code:
  • Maximum security
  • Emergency Escape
  • 40mm Backset

Need high security? We have got it! Yale British Standard Nightlatches offer the maximum level of protection against known attack methods. The BS4 Max Security Nightlatch lock has been approved to BS8621:2007+A2:2012, BS EN 12209:2003 and BS EN 1303:2005 the highest level of certification currently available making them one of the best available from the original Yale lock inventor.

Endorsed by the police secure by design scheme and supplied with a high security TS007 approved rim cylinder that includes reinforced protective escutcheon plate.

Ideal for use on wooden front doors where the highest level of security is required.

Size: BS4 - 40mm Backset. 


Experience the benefits

Push button to hold back the latch

Yale Quality Keys Included

Security Standards

Secured by Design approved 

The Secured by Design scheme is working to reduce crime through sustainable design of products.

Easy Set Up

Wire free for quick and easy installation.

Secure Encryption

10 year guarantee for greater peace of mind.





Ideal for use on wooden front doors

Box Contents:

  • Nightlatch x 1
  • Strike plate x 1
  • Reinforced 6-pin rim cylinder x 1
  • Keys x 2
  • Fittings pack x 1
  • Fitting template and instructions

More Information

More Information
Weight 1.00
Mortice Deadlock No