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National Stock Number:
1240-00-171-4160
Federal Supply Class:
1240
National Item Identification Number:
001714160
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:
| 278703PC12 | 10001 | NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER |
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Techincal Specification:
| MATERIAL | GLASS OPTICAL | | MATERIAL DOCUMENT AND CLASSIFICATION | JAN-G-174, TYPE 517-645, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE | | REFRACTION INDEX | 1.5170 NOMINAL | | DISPERSION | 64.5 ANGSTROMS NOMINAL | | POLISHED SURFACE | BOTH | | SURFACE FINISH | POLISHED | | REFLECTION REDUCING SURFACE | BOTH | | POLISHED PERIPHERY | NOT PROVIDED | | DIAMETER | 39.800 MILLIMETERS MINIMUM AND | | 40.000 MILLIMETERS MAXIMUM | | THICKNESS | 3.300 MILLIMETERS MINIMUM AND | | 3.700 MILLIMETERS MAXIMUM | | BEVEL ANGLE IN DEG | 44.8333 MINIMUM AND | | 45.1667 MAXIMUM | | BEVEL DEPTH | 1.400 MILLIMETERS NOMINAL | | FSC APPLICATION DATA | RANGEFINDER MK 37 MODS 5 AND 6 |
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