MIL-DTL-43607J
3.3.1.3 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or
environmentally preferable materials should be used to the maximum extent possible provided that
the material meets or exceeds the operational and maintenance requirements, and promotes
economically advantageous life cycle costs.
3.4 Design. The major components of the padlock shall be a body, a shackle, and a locking
mechanism. The term shackle as used herein also includes a sliding pin or bar if so designed. The pin
or bar is the part that passes through the locking hole of the mating halves of hasps such as the
shackle does. The shape of the padlock shall be at the option of the contractor, provided the
assembled padlock conforms to all requirements specified herein. The shackle shrouding created by
body extensions shall have a closely-fitted top opening for shackle clearance when the padlock is in
the unlocked fully open position. The shackle shrouding shall have a side opening that will admit the
mating members of hasps conforming to MIL-DTL-29181, NAVSEA drawings 53711-5532337,
53711-5532340, 53711-5532334, 53711-5532335, and NAPEC drawings 0955, 0956, 0957, and
0958. The locking of the padlock on the above described hasps shall be accomplished by either
turning the key or pushing the body into the shackle and turning the key without the assistance of
blocking or spacers between the shackle and the hasp guard. The padlock shall lock the mating
members of the hasps specified herein when the hasps are mounted as specified in the installation
instructions of the specified hasps. The assembled padlock, excluding the chain, clevis, and plate
shall have a volume that is not more than 20 cubic inches (328 cubic centimetre (cm)), and a weight
that is not more than 6 pounds (lb) (3.0 kilogram (kg)). See figure 1 for examples of padlocks with a
shrouded shackle.
3.4.1 Key and keyways. The key and keyways design shall be configured exclusively for military
use, and shall not be available commercially. The key and keyways design, and the reverse image of
the design, shall be set aside for DoD use only. There shall be not less than 100,000 different key
changes for padlocks supplied under any one contract.
3.4.2 Chain. clevis. and plate. A chain, attachment plate, and clevis shall be furnished with each
padlock. The chain shall be securely attached to the padlock case by means of a clevis and rivet or
other secure fastening device, in such a manner that it will not interfere with the operation of the
locking mechanism. The chain length shall be 9 inches (229 millimetre (mm)) plus or minus one link.
Chain, clevis, fastener, screws, and plate shall be fabricated from corrosion-resisting material. The
chain shall be attached to the lock in such a manner that the key opening and drain holes shall
perform their proper function. The chain shall conform to RR-C-271, type I, grade C, class 5, style 1.
3.5 General requirement. The padlock shall meet general requirements as specified in 3.5.1 through
3.5.3.
3.5.1 Surreptitious neutralization resistance. The padlock shall resist surreptitious neutralization for
not less than 15 minutes before and after the wear resistance cycling (see 3.5.2.1 and 4.5.1.1).
3.5.2 Effectiveness of design and materials durability. The design features and the materials used
shall be such that the padlock shall perform as specified in 3.5.2.1 through 3.5.2.9.
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