MIL-DTL-1716J
3.3.4.2 Filler, nib. The nib filler shall be fabricated from material specified in 3.2.4.2.
3.3.4.3 Soldering. After assembly of the lock, the nib filler shall be soldered in place with
solder specified in 3.2.5. Soldered joints shall be complete, sound, smooth and free from pin
holes and flux residue.
3.3.5 Alternate construction. Locks may be fabricated by an alternate method conforming to
Drawing 5-4-1075 and as specified herein:
a. Locks shall be fabricated from material specified in 3.2.4.3.
b. Locks shall be heat treated to a Rockwell hardness of C40-45.
When tested as specified in 4.4, the Rockwell hardness shall be within the limits of a
minimum of C40 and a maximum of C45 prior to stress relieving before plating.
3.4 Finish.
3.4.1 Plating, zinc. Locks shall be zinc plated conforming to type II, SC-3 of ASTM B 633
except as follows:
a. Locks shall be stress relieved before plating by heat treatment at 275o F to 350o F for a
period of 30 minutes followed by air cooling.
b. The temperature of the heat treatment for embrittlement relief of the locks after plating
shall be 340o F plus or minus 20o F for a minimum period of 3 hours.
3.4.2 Pretreatment. Prior to assembly, interior and exterior surfaces of the magnesium plug
and tubular sections shall be pretreated in accordance with type III or IV of MIL-M-3171.
3.4.3 Priming. After pretreatment as specified in 3.4.2, the pole shall be primed when using
the enamel specified in 3.2.8. Prior to assembly, all outside surfaces of the tubular sections,
plug and spindle shall be coated with primer specified in 3.2.8. Priming is not required when
the coating specified in 3.2.10 or 3.2.11 is used.
3.4.4 Enameling. Either before assembly of the pole or with the assembled pole (excepting
the locks and lock retaining sleeves) in the fully extended position, all exterior primed
surfaces shall be coated with enamel specified in 3.2.8. At the option of the contractor,
interior surfaces may be enameled. The enamel (or alternate coatings) shall be air dried or
cured in accordance with the enamel manufacturer's instructions. The coating shall level out
to produce a smooth, uniform, dry film without runs, wrinkles, streaks, grit and coarse
particles. Any coating damaged during assembly of the pole or during examination shall be
touched up.
3.5 Marking for identification. The letters "U.S." and the manufacturer's name or trade name
or trademark of such characters identifiable with the manufacturer, shall be distinctly indented
or raised on the bottom surface of the plug and shall be not less than 1/8 inch in size.
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