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National Stock Number:
6650-01-285-3385
Federal Supply Class:
6650
National Item Identification Number:
012853385
Description:
RING,RETAINING,OPTICAL ELEMENT
Detail:
A CYLINDRICAL ITEM HAVING AN INTERNALLY FLANGED DIAMETER DESIGNED TO RETAIN A LENS OR WINDOW IN THE OBJECTIVE END, OR A DIOPTER SCALE AT THE VIEWING END OF AN OPTICAL INSTRUMENT. IT MAY HAVE ONE OR MORE OF THE FOLLOWING CHARACTERISTICS: INTERNAL THREAD OR MACHINED FOR A PRESS FIT, METHOD OF SECURING, AND/OR KNURLED PERIPHERY. FOR EXTERNALLY THREADED ITEMS, SEE RETAINER, OPTICAL ELEMENT. EXCLUDES CELL, OPTICAL ELEMENT; NUT, PLAIN KNURLED; NUT, PLAIN ROUND; AND RING, RETAINING.
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Manufacturer Information:
| 5525872 | 53711 | NAVAL SEA SYSTEMS COMMAND |
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Techincal Specification:
| MATERIAL | COPPER ALLOY | | OUTSIDE DIAMETER | 1.719 INCHES NOMINAL | | SCREW THREAD SERIES DESIGNATOR | UNS | | SPECIAL FEATURES | 125 MICROINCH SURFACE FINISH | | THREAD CLASS | 3A | | THREAD LENGTH | 0.250 INCHES | | THREAD LOCATION | EXTERNAL | | THREAD SIZE | 1 23/32-20 | | THREAD PITCH DIAMETERS | +1.6826 TO 1.6862 INCHES |
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