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National Stock Number: 1240-00-990-6559
Federal Supply Class: 1240
National Item Identification Number: 009906559
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:
10514254 | 19200 | US ARMY ARDEC RDECOM | 1240009906559 | A00AM | E.C.A ETABLISSEMENT CENTRAL DESAPPROVISIONNEMENTS DES FORCES ARMEE |
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Techincal Specification:
BEVEL ANGLE IN DEG | 45.000 NOMINAL | BEVEL DEPTH | 0.039 INCHES NOMINAL AND 0.118 INCHES NOMINAL | DIAMETER | 4.184 INCHES MINIMUM AND 4.188 INCHES MAXIMUM | DISPERSION | 64.5 ANGSTROMS NOMINAL | FSC APPLICATION DATA | PERISCOPE,XM32,OPTICAL SIGHTING AND RANGING EQUIPMENT | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE B, TYPE 517-645 MIL SPEC SINGLE MATERIAL RESPONSE | MATERIAL | GLASS OPTICAL | POLISHED PERIPHERY | NOT PROVIDED | POLISHED SURFACE | BOTH | REFLECTION REDUCING SURFACE | BOTH | REFRACTION INDEX | 1.5170 NOMINAL | SPECIAL FEATURES | LIGHT DEVIATION 3 MINUTES | SURFACE FINISH | GROUND AND POLISHED | THICKNESS | 0.383 INCHES MINIMUM AND 0.393 INCHES MAXIMUM |
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