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National Stock Number:
1240-01-280-3181
Federal Supply Class:
1240
National Item Identification Number:
012803181
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:
| 717612151-002 | 04939 | LOCKHEED MARTIN CORPORATION |
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Techincal Specification:
| LENGTH | 6.867 INCHES NOMINAL | | MATERIAL | SELENIUM AND ZINC LOCATION NOT OTHERWISE SPECIFIED | | SPECIAL FEATURES | ADDITIONAL MATERIAL IS ZINC SULFIIDE | | POLISHED SURFACE | BOTH | | WIDTH | 4.043 INCHES NOMINAL | | THICKNESS | 0.350 INCHES NOMINAL |
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