1240-00-171-7902 WINDOW,OPTICAL INSTRUMENT Index 5330-00-171-7924 SEAL,PLAIN ENCASED

National Stock Number:
1240-00-171-7903

Federal Supply Class:
1240

National Item Identification Number:
001717903

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.


Manufacturer Information:
278697PC310001NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER


Techincal Specification:
BEVEL ANGLE IN DEG45.000 NOMINAL
BEVEL DEPTH0.900 MILLIMETERS NOMINAL
DIAMETER16.010 MILLIMETERS NOMINAL
DIFFUSION PRODUCING SURFACEBOTH
FSC APPLICATION DATARANGEFINDER MK 57 MOD 4
MATERIAL DOCUMENT AND CLASSIFICATIONJAN-G-174, TYPE 517-645, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED
MATERIALGLASS OPTICAL LOCATION NOT OTHERWISE SPECIFIED
POLISHED PERIPHERYNOT PROVIDED
POLISHED SURFACEBOTH
REFLECTION REDUCING SURFACEBOTH
REFRACTION INDEX1.5170 NOMINAL
THICKNESS2.500 MILLIMETERS NOMINAL


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