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National Stock Number:
1240-00-171-4220
Federal Supply Class:
1240
National Item Identification Number:
001714220
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:
| 181146PC1 | 10001 | NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER |
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Techincal Specification:
| DIAMETER | 2.5886 INCHES MINIMUM AND 2.5984 INCHES MAXIMUM | | DISPERSION | 64.5 ANGSTROMS NOMINAL | | FSC APPLICATION DATA | PERISCOPE MK 23,MOD 0 | | LENGTH | 3.4941 INCHES MINIMUM AND 3.5039 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-16592, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED | | MATERIAL | GLASS LOCATION NOT OTHERWISE SPECIFIED | | SPECIAL FEATURES | 4 CORNERS 12.7 MM /0.500 IN./ RADIUS | | POLISHED PERIPHERY | NOT PROVIDED | | POLISHED SURFACE | BOTH | | REFLECTION REDUCING SURFACE | BOTH | | REFRACTION INDEX | 1.5170 NOMINAL | | THICKNESS | 0.3937 INCHES NOMINAL |
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