NSN 1240-00-171-4178

Part Details | OPTICAL INSTRUMENT WINDOW

1240-00-171-4178 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.

Alternate Parts: 1040155, 52476, 1240-00-171-4178, 00-171-4178, 1240001714178, 001714178

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
12JAN 01, 196300-171-417810908 ( WINDOW, OPTICAL INSTRUMENT )
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-00-171-4178
Part Number Cage Code Manufacturer
104015510001NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT
5247621587OPTICAL TECHNOLOGY DEVICES INC
Technical Data | NSN 1240-00-171-4178
Characteristic Specifications
REFRACTION INDEX1.5170 NOMINAL
DISPERSION64.5 ANGSTROMS NOMINAL
POLISHED SURFACE BOTH
REFLECTION REDUCING SURFACE BOTH
POLISHED PERIPHERY NOT PROVIDED
DIAMETER50.950 MILLIMETERS MINIMUM AND 51.000 MILLIMETERS MAXIMUM
THICKNESS5.800 MILLIMETERS MINIMUM AND 6.200 MILLIMETERS MAXIMUM
BEVEL ANGLE IN DEG45.000 NOMINAL
BEVEL DEPTH0.750 MILLIMETERS NOMINAL
FSC APPLICATION DATATELESCOPE MK 102 MOD 3