NSN 1240-00-864-2931
Part Details | OPTICAL INSTRUMENT WINDOW
1240-00-864-2931 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: 7660439, 1240-00-864-2931, 00-864-2931, 1240008642931, 008642931
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | JAN 01, 1962 | 00-864-2931 | 10908 ( WINDOW, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-00-864-2931
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 7660439 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 1240-00-864-2931
| Characteristic | Specifications |
|---|---|
| REFRACTION INDEX | 1.5170 NOMINAL |
| DISPERSION | 64.5 ANGSTROMS NOMINAL |
| POLISHED SURFACE | BOTH |
| REFLECTION REDUCING SURFACE | BOTH |
| POLISHED PERIPHERY | NOT PROVIDED |
| WIDTH | 0.990 INCHES MINIMUM AND 1.000 INCHES MAXIMUM |
| LENGTH | 1.557 INCHES MINIMUM AND 1.562 INCHES MAXIMUM |
| THICKNESS | 0.190 INCHES MINIMUM AND 0.200 INCHES MAXIMUM |
| BEVEL ANGLE IN DEG | 42.000 MINIMUM AND 48.000 MAXIMUM |
| BEVEL DEPTH | 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM |
| SPECIAL FEATURES | ALL CORNERS WITH A 0.310 IN. RADIUS |
| FSC APPLICATION DATA | TELESCOPE,PANORAMIC |