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		                        | National Stock Number:
 1240-00-764-1306
 
 Federal Supply Class:
 1240
 
 National Item Identification Number:
 007641306
 
 Description:
 WINDOW,OPTICAL INSTRUMENT
 
 Detail:
 A COLOR FREE ITEM OF TRANSPARENT OR TRANSLUCENT MATERIAL, USUALLY OPTICAL GLASS, HAVING SPECIFIC LIGHT DISPERSIVE AND REFRACTIVE PROPERTIES. THIS ITEM MUST HAVE TWO PLANE-PARALLEL SURFACES AND IS DESIGNED FOR USE IN AN OPTICAL INSTRUMENT TO PROVIDE A BARRIER TO FOREIGN MATTER AND/OR PERMIT LIGHT TRANSMISSION IN OR TO THE OPTICAL SYSTEM.
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 Manufacturer Information:
 
 | 7641306 | 19200 | US ARMY ARDEC RDECOM | 
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 Techincal Specification:
 
 | MATERIAL | GLASS LOCATION NOT OTHERWISE SPECIFIED |  | SPECIAL FEATURES | CELL P/N5184533,BRASS COMP B; WASHER P/N5184535,BRASS COMP C | 
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