NSN 1240-00-698-1666
Part Details | DIOPTER SCALE
1240-00-698-1666 A graduated scale, usually cylindrical in shape, attached to, or forming a part of, the focusing nut or knob of the eyepiece of an optical instrument. It is read in conjunction with a line or dart indicator to measure the change in refracting power of the eyepiece, in diopters, and introduces correction to compensate for the eyesight variation of the observer. It may have a knurled periphery and/or teeth on the inside diameter.
Alternate Parts: 230423PC1, 1240-00-698-1666, 00-698-1666, 1240006981666, 006981666
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | JAN 01, 1963 | 00-698-1666 | 21868 ( SCALE, DIOPTER ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-00-698-1666
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 230423PC1 | 10001 | NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT |
Technical Data | NSN 1240-00-698-1666
| Characteristic | Specifications |
|---|---|
| MATERIAL | COPPER ALLOY |
| SURFACE TREATMENT | ANODIZE |
| SCALE DIVISION QUANTITY | 1 |
| INSCRIPTION COLOR | BLACK |
| OVERALL OUTSIDE DIAMETER | 1.390 INCHES MINIMUM AND 1.410 INCHES MAXIMUM |
| INSIDE DIAMETER | 0.594 INCHES NOMINAL |
| OVERALL HEIGHT | 0.677 INCHES MINIMUM AND 0.697 INCHES MAXIMUM |
| MOUNTING CONFIGURATION | TWO 0.138 IN.-40 NF THREADED SETSCREW HOLES |