MIL-DTL-15665J
evaluated to determine compliance with the requirements specified in
3.4.1.
4.5.2
Test of Die Casting.
4.5.2.1 Test for integral prongs. Insignia to be tested shall be
placed in a jig which allows no movement of the insignia and position
prongs at a 30 degree angle above the horizontal. A vertical 10 pound
load shall be applied to the top third of each prong. The prongs shall be
examined to determine compliance with 3.6.5.2.
4.5.2.2 Direct micro thickness test for copper plating. Copper
plating thickness shall be determined shall be determined by standard
commercial testing. Results shall be evaluated to determine compliance
with 3.6.2.
4.5.3 Acid test for gold and rhodium plating. If the test insignia
has been lacquered, the lacquer shall be completely removed prior to
testing with an organic solvent. The test acid shall be applied as
follows: Place a drop of acid of not less than 1/16 inch (0.16 cm) in
diameter on three (3) different spots on the plated surface allowing the
drops to remain for not less than one (1) minute during which time the
surface of the item shall be inspected to determine compliance with the
requirements in 3.7.1.1 and 3.7.1.2. No visible chemical reactions shall
occur. Acid drops to be placed on flat surfaces on the obverse or reverse
face when possible. A minimum of two spots must withstand the acid test.
The test acid shall be applied at room temperature (60 to 80 degrees
Fahrenheit/15.6 to 26.7 degrees Celsius) and shall consist of a solution
containing 50 percent by volume of chemically pure nitric acid (specific
gravity 1.42) and an equal volume of distilled water.
4.5.4
Test for soldered joints.
4.5.4.1 Hard solder. Hard soldered items shall be placed in an oven
maintained
at 1075 degrees Fahrenheit + 5 degrees Fahrenheit (561.7
degrees Celsius + 2.78 degrees Celsius) for 15 minutes. While at this
temperature the item shall be lifted by the attaching device and shall be
inspected to determine compliance with the requirements specified in
3.6.3.1.
4.5.4.2 Soft solder. Soft soldered items shall be placed in an oven
maintained at 365 degree Fahrenheit + 5 degrees Fahrenheit (184.98 degrees
Celsius + 2.78 degrees Celsius) for 15 minutes. While at this temperature
the item shall be lifted by the superimposed design and shall be inspected
to determine compliance with the requirements specified in 3.6.3.2.
4.5.5 Test for electronically fused joints. Item to be tested
shall be anchored on a horizontal surface. All prongs on each end item
shall be grasped at least 1/3 its length above the fused joint and bent
through an angle of 90 degrees (45 degrees to each side of the vertical)
until the prong breaks. The fused joint shall then be examined to
determine compliance with 3.6.3.1. A bending tool in the form of a 45
degree template may be used for this test provided the prong is gripped at
least 1/3 its length above the fused joint.
4.5.6 Test for shore hardness of epoxy resin. Shore hardness shall
be determined in accordance with ASTM-D-2240. Results shall be evaluated
to determine compliance with the requirements of 3.7.2.3.
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