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About This Item

 

Full Description

The scope of this recommended practice is limited to mechanical key bitting, cylinder pinning and multiplex key systems.

The purpose of this document is to recommend the approach to selecting the optimal keying system, once the type of cylinder has been selected by other criteria.

This recommended practice is not intended to provide sufficient information for a full understanding of master key systems.

Various types of cylinders have varying levels of security and performance to which other standards may apply. These include ANSI and Underwriters Laboratories standards.

 

Document History

  1. BHMA A156.28-2018


    Recommended Practices for Keying Systems

    • Most Recent
  2. BHMA A156.28-2013


    Recommended Practices for Keying Systems

    • Historical Version
  3. BHMA A156.28-2007

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    Recommended Practices for Keying Systems

    • Historical Version