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		                             National Stock Number: 6650-01-170-4394
  Federal Supply Class: 6650
  National Item Identification Number: 011704394
  Description: PRISM,OPTICAL INSTRUMENT
  Detail: A TRANSPARENT ITEM WITH AT LEAST TWO POLISHED PLANE SURFACES INCLINED TOWARD EACH OTHER, DESIGNED FOR USE IN OPTICAL INSTRUMENTS TO REFLECT AND/OR REFRACT A BEAM OF LIGHT. IT MAY HAVE ONE OR MORE MIRRORED SURFACES FOR GREATER REFLECTION. INCLUDES OPTICAL WEDGES USED TO DIVERT PATHS OF LIGHT BY REFRACTION, BUT TO A LESSER DEGREE. SEE ALSO BEAM SPLITTER, OPTICAL INSTRUMENT.
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  Manufacturer Information:
 | 13074198 | 04939 | LOCKHEED MARTIN CORPORATION |  | 13074198 | 58260 | PROGRAM MANAGER ADVANCED ATTACK HELICOPTER BARCOM AMCPM-AAH |   
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  Techincal Specification:
 | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, GRADE B, TYPE 517-642 MIL SPEC SINGLE MATERIAL RESPONSE |  | MATERIAL | GLASS OPTICAL |  | STYLE DESIGNATOR | PENTA |   
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