FF-P-2827A
3.3 Materials. Materials used shall be free from defects which would
adversely affect the performance or maintainability of the individual components or
of the overall assembly. Materials not specified herein shall be of the same
quality used for the intended purpose in commercial practice. Unless otherwise
specified herein, all equipment, material, and articles incorporated in the work
covered by this specification are to be new and fabricated using materials produced
from recovered materials to the maximum extent possible without jeopardizing the
intended use. The term "recovered materials" means materials which have been
collected or recovered from scrap material and reprocessed to become a source of
raw materials, as opposed to virgin raw materials. Unless otherwise specified, none
of the above shall be interpreted to mean that the use of used or rebuilt products
is allowed under this specification.
3.3.1 Material deterioration and control. The padlock shall be fabricated from
compatible materials, inherently corrosion and deterioration resistant, or treated
to provide protection against the various forms of corrosion and deterioration that
may be encountered in any of the applicable storage and operating environments to
which the padlock may be exposed.
3.3.1.1 Dissimilar metals. Dissimilar metals, as defined in MIL-STD-889,
shall be insulated from one another to minimize or prevent galvanic corrosion.
3.3.1.2 Identification of materials and finishes. The contractor shall
identify the specified material, material finish, or treatment used for, on, or
between components and sub-components, and shall make such information available,
upon request, to the contracting officer or designated representative.
3.4 Design. The major components of a padlock shall be a body, a keyed
cylinder, a heel and toe dead bolt locking mechanism and a retained "U" shaped
shackle. The shape of the padlocks shall be at the option of the contractor,
provided the assembled padlock conforms to all requirements specified herein.
Padlocks manufactured to size A specifications shall have a nominal 0.375 inch (10
mm) diameter shackle and clear dimensions of 1.25 inches (31.75 mm) vertically and
1.25 inches (31.75 mm) horizontally. Padlocks manufactured to size B specifications
shall have a nominal 0.50 inch (13 mm) diameter shackle and clear dimensions of
1.50 inches (38.10 mm) vertically and 1.25 inches (31.75 mm) horizontally. The
padlocks shall secure closures of 0.375 inch (10 mm) and 0.50 inch (13 mm) diameter
steel security chains, gate hasps, cargo closures/tiedowns, warehouse and shed
doors, etc. Each padlock within its size group shall be keyed differently. The
assembled individual padlock (either size A or B) shall have a volume that is not
more than 24 cubic inches (0.00042 cubic meters), and shall not weigh more than 3
pounds (lb) (1.36 kilograms [kg]). Unless otherwise specified, dimensional
tolerances are ±0.020 inches (±0.51 mm), capture tolerances for size A and B shall
be +0.25 inches (+6.35 mm).
3.4.1 Key and keyways. There shall be not less than 15,000 different key
changes for each size of padlock supplied under any one contract. For both sizes,
the key shall be captive in the cylinder when the padlock is unlocked.
3.4.2 Key integrity. The keys furnished with any one padlock shall not be
capable of locking, unlocking, or removing the cylinder of any other padlock. Each
cylinder shall resist manipulation by each other key for a minimum of one minute.
3.4.3 Forced entry resistance. The padlock shall withstand a concentrated
forced entry attack using a hammer not to exceed 3 lb (1.36 kg) in weight with a
handle 18 inches (0.45 meter) in length for 1 minute.
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