ANSI/BHMA A156.5 establishes requirements for mechanical
cylinders, electrified input devices, and push button mechanisms,
which include operational and strength tests.
Related products are covered in additional BHMA Publications:
A156.25 ANSI/BHMA A156.28 for Master Keying Systems, and ANSI/BHMA
A156.30 for High Security Cylinders and Input Devices.
Auxiliary Locks previously included in this Standard are now
found in ANSI/BHMA A156.36 for Auxiliary Locks.
Tests described in this Standard are performed under laboratory
conditions. In actual usage, results vary because of installation,
maintenance and environmental conditions.
The intent of this standard is to provide fair, uniform and
repeatable testing of locking cylinders and input devices used in
commercially available door hardware. Each testing section of the
standard identifies the tools and/or fixtures applicable to that
particular test. We recognize that any cylinder can be compromised
or destroyed by excessive force or extended time or by the use of
custom designed tools or techniques. For cylinders and input
devices to be used beyond the scope of this standard, we recommend
the guidance of or consultation with an independent physical
No lock can provide complete security by itself. Locks may be
defeated by forcible or technical means, or evaded by entry
elsewhere on the property. No lock can substitute for caution,
awareness of your environment, and common sense. Builders hardware
is available in multiple performance grades to suit the
application. In order to enhance security and reduce risk, you
should consult a qualified locksmith or other security
professional. For applications where pick resistance and other
higher security protections are required consider locks meeting UL
437-2013 Key Locks, or ANSI/BHMA A156.30-2010 for High Security
Order online or call: Americas: +1 800 854 7179 | Asia Pacific: +852 2368 5733 | Europe, Middle East, Africa: +44 1344 328039