NSN 1240-00-389-3555
Part Details | DIOPTER SCALE
1240-00-389-3555 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: 230938PC3, 1240-00-389-3555, 00-389-3555, 1240003893555, 003893555
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | JAN 01, 1963 | 00-389-3555 | 21868 ( SCALE, DIOPTER ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-00-389-3555
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 230938PC3 | 10001 | NAVAIR AND NAVSEA MANAGEDORIGINAL DESIGN ACTIVITY DWG NOT |
Technical Data | NSN 1240-00-389-3555
| Characteristic | Specifications |
|---|---|
| MATERIAL | COPPER ALLOY |
| SCALE DIVISION QUANTITY | 8 |
| SCALE UNIT OF MEASURE INSCRIPTION | PLUS 2 TO MINUS 4 AND MINUS 2 TO PLUS 4 |
| INSCRIPTION COLOR | WHITE |
| OVERALL OUTSIDE DIAMETER | 2.750 INCHES NOMINAL |
| INSIDE DIAMETER | 2.625 INCHES NOMINAL |
| OVERALL HEIGHT | 0.200 INCHES NOMINAL |
| MOUNTING CONFIGURATION | ONE SETSCREW HOLE 0.094 IN. DIA |
| FSC APPLICATION DATA | TELESCOPE MK31 |
