NSN 1240-00-171-4220
Part Details | OPTICAL INSTRUMENT WINDOW
1240-00-171-4220 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: 181146PC1, 1240-00-171-4220, 00-171-4220, 1240001714220, 001714220
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | JAN 01, 1963 | 00-171-4220 | 10908 ( WINDOW, OPTICAL INSTRUMENT ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-00-171-4220
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 181146PC1 | 10001 | NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT |
Technical Data | NSN 1240-00-171-4220
| Characteristic | Specifications |
|---|---|
| REFRACTION INDEX | 1.5170 NOMINAL |
| DISPERSION | 64.5 ANGSTROMS NOMINAL |
| POLISHED SURFACE | BOTH |
| REFLECTION REDUCING SURFACE | BOTH |
| POLISHED PERIPHERY | NOT PROVIDED |
| DIAMETER | 2.5886 INCHES MINIMUM AND 2.5984 INCHES MAXIMUM |
| LENGTH | 3.4941 INCHES MINIMUM AND 3.5039 INCHES MAXIMUM |
| THICKNESS | 0.3937 INCHES NOMINAL |
| SPECIAL FEATURES | 4 CORNERS 12.7 MM /0.500 IN./ RADIUS |
| FSC APPLICATION DATA | PERISCOPE MK 23,MOD 0 |
