Engineering and Expeditionary Warfare Center

Low Security Padlocks

Solid Body Order Info
Laminated Body Order Info



Low security padlocks, sometimes referred to as secondary locks, are used for administrative control, on gates barring access to in-process/production facilities, for securing weapons racks contained within secured areas, and where secondary locks are specified.  These padlocks provide only minimal resistance to forced or surreptitious entry and must not be used to secure classified material.  Low security padlocks must be key-retaining and be stamped with "US," or "US Set" if a padlock set.  Key-retaining means the key must be captive (unremovable) in the cylinder when the padlock is unlocked.

Military specifications for low security padlocks have been cancelled.  The low security padlock military specification has been replaced by Commercial Item Descriptions (CID) A-A-59486C, Padlock Set (Individually keyed or keyed alike), and A-A-59487C, Padlock (key operated).  These CID also replace cancelled Commercial Item Description Padlock A-A-1927.


Lock Bumping and Low Security Locks

"Lock bumping" is a recently publicized technique of opening some kinds of locks.  Although the technique has been known by some locksmiths for many decades, it has been popularized on the Internet, where it is often misrepresented and sensationalized.  In cases where it is effective, it usually requires little time and skill, and leaves little evidence.  The Department of Defense (DoD) takes this seriously and is requiring that new procurements of low security padlocks be tested against "bumping."  Depending on the application of a particular low security padlock, "bumping" may be seen as a significant threat.  Existing padlocks may continue to be used, but you may want to replace existing locks with "bump resistant" ones.  When such padlocks are available through the Supply System, we will announce that in our next newsletter and on our website.  General Field Service padlocks and High Security padlocks are NOT susceptible to "bumping."


Laminated padlock body

Laminated padlock body with chain

Solid padlock body



1322 Patterson Ave. SE, Suite 1000, Washington Navy Yard, D.C. 20374-5065

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