High security padlocks are intended for general military use with high security hasps where a high degree of physical security is required as specified by Enclosure 5, paragraph 2.g.(2) of
DoD Manual 5100.76.
High security padlocks are covered by military specification
"Padlock, Key Operated, High Security, Shrouded Shackle".
The number of keys for a high security padlock are limited to one control key and two operating keys as specified in paragraph 18.104.22.168 of MIL-DTL-43607J.
Enclosure 4, paragraph 10.b of DoD Manual 5100.76 requires that the number of keys be held to an absolute minimum.
High security hasps must conform to military specification
"Hasp, High Security, Shrouded, For High And Medium Security Padlock".
High Security Hasps page
for more information on high security hasps.
The S&G 951 high security padlock has been tested and approved meeting military specification MIL-DTL-43607J and is available from DLA Land and Maritime.
Click on the Ordering Information tab for NSNs and information on how to procure this lock.
The S&G 833C is the only other high security padlock that meets MIL-DTL-43607J and is approved for use, however, it is no longer manufactured.
The DoD Lock Program can provide servicing and demilling of S&G 833C and 951 high security padlocks.
Click on the High Security Padlock Services tab for more information.