NSN 1240-00-389-3540
Part Details | OPTICAL INSTRUMENT WINDOW
1240-00-389-3540 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: 201769PC4, 1240-00-389-3540, 00-389-3540, 1240003893540, 003893540
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | JAN 01, 1963 | 00-389-3540 | 10908 ( WINDOW, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-00-389-3540
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 201769PC4 | 10001 | NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT |
Technical Data | NSN 1240-00-389-3540
| Characteristic | Specifications |
|---|---|
| REFRACTION INDEX | 1.5171 NOMINAL |
| DISPERSION | 64.5 MILLIMICRONS NOMINAL |
| POLISHED PERIPHERY | NOT PROVIDED |
| DIAMETER | 43.0 MILLIMETERS NOMINAL |
| THICKNESS | 4.0 MILLIMETERS NOMINAL |
| BEVEL ANGLE IN DEG | 45.000 NOMINAL |
| BEVEL DEPTH | 1.0 MILLIMETERS NOMINAL |
| END ITEM IDENTIFICATION | PERISCOPE MK26 |
