NSN 1240-00-990-6559
Part Details | OPTICAL INSTRUMENT WINDOW
1240-00-990-6559 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: 1240009906559, 10514254, 1240-00-990-6559, 00-990-6559, 1240009906559, 009906559
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | JAN 01, 1962 | 00-990-6559 | 10908 ( WINDOW, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-00-990-6559
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 1240009906559 | A00AM | E.C.A ETABLISSEMENT CENTRALDESAPPROVISIONNEMENTS DES FORCES |
| 10514254 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 1240-00-990-6559
| Characteristic | Specifications |
|---|---|
| REFRACTION INDEX | 1.5170 NOMINAL |
| DISPERSION | 64.5 ANGSTROMS NOMINAL |
| POLISHED SURFACE | BOTH |
| SURFACE FINISH | GROUND AND POLISHED |
| REFLECTION REDUCING SURFACE | BOTH |
| POLISHED PERIPHERY | NOT PROVIDED |
| DIAMETER | 4.184 INCHES MINIMUM AND 4.188 INCHES MAXIMUM |
| THICKNESS | 0.383 INCHES MINIMUM AND 0.393 INCHES MAXIMUM |
| BEVEL ANGLE IN DEG | 45.000 NOMINAL AND 45.000 NOMINAL |
| BEVEL DEPTH | 0.039 INCHES NOMINAL AND 0.118 INCHES NOMINAL |
| SPECIAL FEATURES | LIGHT DEVIATION 3 MINUTES |
| FSC APPLICATION DATA | PERISCOPE,XM32,OPTICAL SIGHTING AND RANGING EQUIPMENT |