NSN 1240-00-620-4979
Part Details | OPTICAL INSTRUMENT WINDOW
1240-00-620-4979 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: 8200495, 1240006204979, 8200495, 8200495, 1240-00-620-4979, 00-620-4979, 1240006204979, 006204979
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | JAN 01, 1963 | 00-620-4979 | 10908 ( WINDOW, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-00-620-4979
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 8200495 | 32865 | DRS NETWORK & IMAGING SYSTEMS, LLC |
| 1240006204979 | A00AM | E.C.A ETABLISSEMENT CENTRALDESAPPROVISIONNEMENTS DES FORCES |
| 8200495 | 03829 | GENERAL SCIENTIFIC CORPORATIONDIV GENERAL SCIENTIFIC CORP |
| 8200495 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 1240-00-620-4979
| Characteristic | Specifications |
|---|---|
| REFRACTION INDEX | 1.5170 NOMINAL |
| DISPERSION | 64.500 ANGSTROMS NOMINAL |
| POLISHED SURFACE | BOTH |
| REFLECTION REDUCING SURFACE | BOTH |
| POLISHED PERIPHERY | NOT PROVIDED |
| DIAMETER | 2.022 INCHES MINIMUM AND 2.025 INCHES MAXIMUM |
| THICKNESS | 0.418 INCHES MINIMUM AND 0.458 INCHES MAXIMUM |
| BEVEL ANGLE IN DEG | 42.000 MINIMUM AND 48.000 MAXIMUM |
| BEVEL DEPTH | 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM |