NSN 1240-00-520-4253 005204253
Product Details | OPTICAL INSTRUMENT LENS
1240-00-520-4253 An unmounted, transparent, color free lens which may be treated with a low reflection coating to increase light transmission. Includes single and compound elements. For items having two plane parallel surfaces, see WINDOW, OPTICAL INSTRUMENT. Excludes RETICLE, OPTICAL INSTRUMENT.20258550055Night Vision Equipment, Emitted and Reflected Radiation66500063Optical Instruments, Test Equipment, Components and Accessories
Part Alternates: 005204253
Fire Control Equipment | Optical Sighting and Ranging Equipment
| Supply Group (FSG) | NSN Assign. | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | 00-520-4253 | 21884 ( LENS, OPTICAL INSTRUMENT ) |
Drawings & Photos | NSN 1240-00-520-4253
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Related Products | NSN 1240-00-520-4253
Technical Data | NSN 1240-00-520-4253
| Characteristic | Specifications |
|---|---|
| MATERIAL | GLASS, OPTICAL, MIL-G-174, GRADE C, TYPE 541-599 OR GLASS, OPTICAL, MIL-G-174, GRADE C, TYPE 621-362 |
| COMPOUND LENS STYLE | E1 DOUBLET |
| INDIVIDUAL LENS STYLE | D1 DOUBLE CONVEX AND D6 MENISCUS DIVERGING |
| DIAMETER | 0.686 INCHES MINIMUM AND 0.689 INCHES MAXIMUM |
| AXIAL THICKNESS | 0.236 INCHES NOMINAL AND 0.024 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.240 INCHES MINIMUM AND 0.272 INCHES MAXIMUM |
| COMPOUND LENS EDGE THICKNESS | 0.166 INCHES NOMINAL |
| ELEMENT LEFT SURFACE RADIUS | 0.793 INCHES AND -0.595 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -0.595 INCHES AND -4.220 INCHES |
| EQUIVALENT FOCAL LENGTH | 1.444 INCHES |
| BACK FOCAL LENGTH | 1.281 INCHES |
| REFRACTION INDEX | 1.5411 NOMINAL AND 1.6210 NOMINAL |
| ABBE CONSTANT | 59.900 AND 36.200 |
| SPECIAL FEATURES | REFLECTION REDUCING TREATMENT ON FRONT ANDBACK SURFACES,JAN-M-621 |
| III FSC APPLICATION DATA | BINOCULAR,M7,M16 |
| MANUFACTURERS CODE | 19200 |
| DESIGN CONTROL REFERENCE | 5204253 |
Restrictions/Controls & Freight Information | NSN 1240-00-520-4253
| Category | Code | Description |
|---|---|---|
| Hazardous Material Indicator Code | N | There is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials |
| Category | Code | Description |
|---|---|---|
| No Freight Information | ||