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National Stock Number:
1240-00-580-0635
Federal Supply Class:
1240
National Item Identification Number:
005800635
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:
| 8298401 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| BEVEL ANGLE IN DEG | 30.000 NOMINAL | | BEVEL DEPTH | 0.125 INCHES NOMINAL | | CRITICALITY CODE JUSTIFICATION | FEAT | | FSC APPLICATION DATA | FIRE CONTROL PERISCOPE | | LENGTH | 4.307 INCHES NOMINAL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, GRADE C, TYPE 517-645 MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED | | MATERIAL | GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED | | POLISHED PERIPHERY | NOT PROVIDED | | POLISHED SURFACE | BOTH | | REFLECTION REDUCING SURFACE | BOTH | | SPECIAL FEATURES | LIGHT DEVIATION NOT TO EXCEED 3 MIN OF ARC PLUS ASTIGMATISM NOT TO EXCEED 20 MILLIDIOPTERS | | WIDTH | 1.312 INCHES NOMINAL | | THICKNESS | 0.302 INCHES MINIMUM AND 0.332 INCHES MAXIMUM |
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