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National Stock Number:
1240-00-819-4713
Federal Supply Class:
1240
National Item Identification Number:
008194713
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:
| 1575529 | 10001 | NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER |
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Techincal Specification:
| BEVEL ANGLE IN DEG | 45.000 NOMINAL | | BEVEL DEPTH | 12.700 MILLIMETERS NOMINAL | | DIAMETER | 833.120 MILLIMETERS NOMINAL | | FSC APPLICATION DATA | FIRE CONTROL RANGEFINDER MK 21 MOD 2 | | MATERIAL DOCUMENT AND CLASSIFICATION | JAN-G-174, GRADE A MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED | | MATERIAL | GLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED | | POLISHED PERIPHERY | NOT PROVIDED | | REFLECTION REDUCING SURFACE | BOTH | | REFRACTION INDEX | 1.5171 NOMINAL | | THICKNESS | 56.900 MILLIMETERS NOMINAL |
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