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National Stock Number:
1240-01-118-9964
Federal Supply Class:
1240
National Item Identification Number:
011189964
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:
| 12293803 | 11934 | SEILER INSTRUMENT AND MANUFACTURING COMPANY, INCORPORATED | | 12293803 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND | | 12293803 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM | | 12293803 | 82577 | RAYTHEON COMPANY |
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Techincal Specification:
| DIAMETER | 2.360 INCHES MINIMUM AND 2.364 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED | | MATERIAL | GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED | | POLISHED PERIPHERY | NOT PROVIDED | | POLISHED SURFACE | BOTH | | SURFACE FINISH | GROUND AND POLISHED | | THICKNESS | 0.250 INCHES NOMINAL |
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