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		                             National Stock Number: 1240-01-628-1989
  Federal Supply Class: 1240
  National Item Identification Number: 016281989
  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:
 | 240665P2 | 05WL4 | GOODRICH CORPORATION |   
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