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|  MIL-M-46314B(MU)
(Copies of specifications, standards, drawings, and packaging data sheets
required by suppliers in connection with specific procurement functions should
be obtained from the procuring activity or as directed by the contracting
officer).
3. REQUIREMENTS
3.1 Fabrication. - The mount shall be manufactured in accordance with
Drawing F8267701 and drawings pertaining thereto. The requirements of this
specification are detailed only to the extent considered necessary to insure
inherent quality and performance capabilities.
3.2 General specification. - The contractor shall be responsible for
adherence to, and compliance with, the following requirements of Specifica-
tion MIL-F-13926:
(a) Order of precedence.
(b) Dimensions and tolerances.
(c) Inorganic protective surface finishes.
(d) Electrical and electronic assemblies.
(e) Part identification and marking.
(f) Workmanship.
3.3 Environmental.
3.3.1 Operating temperatures.- The mount shall meet the applicable
torque requirements of 3.9 while exposed to and thermally stabilized at
ambient temperatures of -40 and +150F.
3.3.2 Vibration. - With the horizontal shaft immobilized, the mount
shall be vibrated at a frequency of 30 cycles per second and an amplitude
of 1/16 inch (1/8 inch total excursion) for a period of 5 minutes A 15 seconds.
Subsequent to vibration, there shall be no evidence of physical failure and
the mount shall meet the following requirements.
3.4 Orientation. - The requirements of 3.5 to 3.9 inclusive shall be
met with the mount orientated in the following position:
(a)
The
flat mounting surface in a vertical plane.
(b)
The
axis of the horizontal shaft in a horizontal plane.
(c)
The
elevation and correction counters set at zero.
(d)
The
quadrant seat horizontal and its cross level vial centered.
(e)
The
telescope socket vertical within 0.5 mil as determined
by the two keyways.
(f) Utilizing their respective mirrors for observation, the
pitch and cant level vial bubbles shall be centered within
the width. of a graduation line.
(g) Utilizing the mirror for observation, the elevation level
vial bubble shall be centered within the width of a graduation
1ine.
NOTE: All level vials shall be illuminated for a minimum of
5 minutes prior to reading level vials.
2.
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