NSN 1240-01-287-6399
Part Details | DIOPTER SCALE
1240-01-287-6399 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: 8270279, 1240-01-287-6399, 01-287-6399, 1240012876399, 012876399
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 12 | OCT 25, 1988 | 01-287-6399 | 21868 ( SCALE, DIOPTER ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 1240-01-287-6399
| Part Number | Cage Code | Manufacturer |
|---|---|---|
| 8270279 | 19200 | US ARMY ARDEC RDECOM |
Technical Data | NSN 1240-01-287-6399
| Characteristic | Specifications |
|---|---|
| MATERIAL | 4$DAL6061 |
| MATERIAL DOCUMENT AND CLASSIFICATION | AQQ-A-200 TO 3, ALLOY 2024, T4$AQQ-A-200 TO 8, 6061, T6$AWW-T-700 TO 3, T3 1ST MATERIAL RESPONSE |
| SCALE DIVISION QUANTITY | 100 |
| SCALE UNIT OF MEASURE INSCRIPTION | 10 GRADUATIONS FROM "10" TO "90" |
| OVERALL OUTSIDE DIAMETER | 1.380 INCHES NOMINAL |
| INSIDE DIAMETER | 1.3120 INCHES NOMINAL |
| OVERALL HEIGHT | 0.360 INCHES NOMINAL |