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National Stock Number:
6650-01-258-0810
Federal Supply Class:
6650
National Item Identification Number:
012580810
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:
| 13076704 | 04939 | LOCKHEED MARTIN CORPORATION | | 13076704 | 58260 | PROGRAM MANAGER ADVANCED ATTACK HELICOPTER BARCOM AMCPM-AAH |
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Techincal Specification:
| APERTURE DIAMETER | 3.190 INCHES NOMINAL | | INTERNAL FLANGE THICKNESS | 0.060 INCHES NOMINAL | | OUTSIDE DIAMETER | 4.000 INCHES NOMINAL | | OVERALL LENGTH | 0.690 INCHES NOMINAL | | MATERIAL | STEEL | | SCREW THREAD SERIES DESIGNATOR | UNS | | THREAD CLASS | 2B | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.230 INCHES | | THREAD LOCATION | INTERNAL | | THREAD PITCH DIAMETERS | +2.7762 TO 2.8100 INCHES | | THREAD SIZE | 2 13/16-32 |
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