Part Details | OPTICAL INSTRUMENT WINDOW
1240-00-171-7899 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: 278691PC5, 1240-00-171-7899, 00-171-7899, 1240001717899, 001717899
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | JAN 01, 1963 | 00-171-7899 | 10908 ( WINDOW, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-00-171-7899
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 278691PC5 | 10001 | NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT |
Technical Data | NSN 1240-00-171-7899
| Characteristic | Specifications |
|---|---|
| REFRACTION INDEX | 1.5230 NOMINAL |
| POLISHED SURFACE | BOTH |
| REFLECTION REDUCING SURFACE | BOTH |
| POLISHED PERIPHERY | NOT PROVIDED |
| DIAMETER | 8.510 MILLIMETERS NOMINAL |
| THICKNESS | 3.000 MILLIMETERS NOMINAL |
| BEVEL ANGLE IN DEG | 45.000 NOMINAL |
| BEVEL DEPTH | 0.700 MILLIMETERS NOMINAL |
| FSC APPLICATION DATA | RANGEFINDER MK 57 MOD O |