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|  MIL-H-48620(AR
3.12 Sealing. - The head assembly shall show no evidence of
leakage inexcess of 0.2 pounds per square inch (psi) when subjected
to an internal pressure of 5 0.10 psi for a minimum of 2 hours.
The interior atmosphere of the accepted head assembly shall contain
nitrogen (having a dew point of at least as low as minus 25F at
atmospheric pressure) between 0.25 and 0.50 pound per square inch.
gage (psig)o
3.13
Cleanliness.
a. Defects.-There shall be no evidence of moisture, grease,
fingerprints, condensates, fractures, and adhesive separations on
any glass component when viewing through either end (including the
unity power system).
b. Dirt. - There shall be no more than three particles of dirt or
foreign material (classed as dirt) on any glass component. The size
of any dirt particle shall not exceed 0.05 inch.
3.14 First Article Inspection. - This specification contains
technical provisions for first article inspection. Requirements for
the submission of first article samples by the contractor shall be
as specified in the contract.
3.15 Workmanship. - The head assembly shall meet the workmanship
requirements of MIL-F-13926 and applicable specifications as cited
on Drawing 11747439. the optical surfaces shall be free of
scratches and blemishes which may affect their optical qualities or
appearance.
4.
QUALITY
ASSURANCE
PROVISIONS
4.1 Responsibility for inspection. - Unless otherwise specified
in the contract or purchase order, the supplier is responsible for
the performance of all inspection requirements as specified herein.
Except as otherwise specified in the contract or orders the supplies
may utilize his own or any other facilities suitable for the per-
formance of the inspection requirements specified herein, unless
disapproved by the Government. In addition, the Government reserves
the right to perform any of the inspections set forth in the speci-
fication where such inspections are deemed necessary to assure
supplies and services conform to prescribed requiremets.
4.1.1 General provisions. - The component and subassembly
inspection requirements of MIL-F-13926 form a part of the quality
assurance provisions of this specification. Definitions of
inspection terms shall be as listed in MIL-STD-109.
7
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