MIL-DTL-43607J
4.4.2 Examination. Samples selected in accordance with 4.4.1.1 shall be examined for defects as
specified in 4.5.1. Presence of any critical defect shall be cause for rejection.
4.5 Inspection procedure. Prior to examination and tests, padlocks shall be lubricated and, unless
otherwise specified herein, all tests shall be performed in the order shown.
4.5.1 Test procedures.
4.5.1.1 Surreptitious neutralization test. The test shall be conducted with the padlock at room
temperature, 70ºF ± 10ºF (21ºC ± 5ºC). Subject the locked padlock to surreptitious attempts to open
the padlock, without the furnished keys. These methods shall include use of devices, equipment and
methods such as picking, shimming, bypassing, impressioning, and other methods used by locksmiths
to open padlocks. These methods which are used to open the padlock without evidence of attempts to
open or harm the padlock shall be conducted for not less than 15 minutes. If the padlock is opened by
any of the surreptitious techniques in less than 15 minutes, it shall constitute failure of this test. In
addition, if any appurtenance, slide, or cover is rendered insecure, or is removed by surreptitious
neutralization, it shall constitute failure of this test (see 3.5.1 and 3.6.4).
4.5.1.2 Wear resistance test. Use the control key to remove and replace the cylinder assembly in the
padlock. Place the cylinder plug in the locked position (shackle, bar, or pin in closed position) and
withdraw the control key. Use an operating key to subject the padlock to 10,000 complete
consecutive cycles of unlocking and locking. A single cycle shall include the following steps:
a. Insert operating key into keyway and use it to rotate cylinder plug to unlocked position. The
bar or pin of the sliding bar or pin type shall move to the open position by the rotation of the
cylinder plug to the unlocked position.
b. Pull shackle fully open and reclose shackle.
(1) This step does not apply to the sliding bar or pin type.
c. Rotate cylinder plug with operating key to locked position and pull on shackle to ensure it is
locked.
(1) For the sliding bar or pin type, the bar or pin shall have been pushed by a cam on the cylinder
plug to the locked position.
d. Remove the operating key from the keyway.
After the 10,000 cycles are completed, conduct the surreptitious neutralization test specified in
4.5.1.1 on the same padlock used in the wear test. Then, use the control key to remove and
replace the cylinder assembly again. If the padlock malfunctions during the 10,000 cycles, fails the
surreptitious neutralization test after the 10,000 cycles, or does not permit removal and replacement
of the cylinder by use of the control key, any one of these shall constitute failure of this test (see
3.5.2.1).
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