NSN 1240-00-641-0659
Part Details | OPTICAL INSTRUMENT WINDOW
1240-00-641-0659 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: 165642PC1, 1240-00-641-0659, 00-641-0659, 1240006410659, 006410659
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | JAN 01, 1963 | 00-641-0659 | 10908 ( WINDOW, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-00-641-0659
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 165642PC1 | 10001 | NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT |
Technical Data | NSN 1240-00-641-0659
| Characteristic | Specifications |
|---|---|
| REFRACTION INDEX | 1.5230 NOMINAL |
| DISPERSION | 58.0 ANGSTROMS NOMINAL |
| POLISHED SURFACE | BOTH |
| REFLECTION REDUCING SURFACE | BOTH |
| POLISHED PERIPHERY | NOT PROVIDED |
| WIDTH | 82.0 MILLIMETERS MINIMUM AND 82.6 MILLIMETERS MAXIMUM |
| LENGTH | 164.592 MILLIMETERS MINIMUM AND 165.100 MILLIMETERS MAXIMUM |
| THICKNESS | 11.180 MILLIMETERS MINIMUM AND 11.688 MILLIMETERS MAXIMUM |
| SPECIAL FEATURES | 4 CORNERS 12.7 MM PORM .20 RADIUS |
| FSC APPLICATION DATA | TELESCOPE MK61,MOD 0 |