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National Stock Number:
1240-00-302-1312
Federal Supply Class:
1240
National Item Identification Number:
003021312
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:
| 8200195 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| APERTURE DIAMETER | 1.750 INCHES NOMINAL | | INTERNAL FLANGE THICKNESS | 0.158 INCHES NOMINAL | | MATERIAL | ALUMINUM ALLOY 2024 | | MOUNTING CONFIGURATION | SIX 0.070 IN. DIA BY 0.073 IN. DEEP MOUNTING HOLES | | OUTSIDE DIAMETER | 2.005 INCHES NOMINAL | | OVERALL LENGTH | 0.192 INCHES NOMINAL | | SCREW THREAD SERIES DESIGNATOR | UNS | | THREAD CLASS | 3B | | THREAD DIRECTION | RIGHT-HAND | | THREAD PITCH DIAMETERS | +1.7162 TO 1.7500 INCHES | | THREAD LENGTH | 0.158 INCHES | | THREAD LOCATION | INTERNAL | | THREAD SIZE | 1 3/4-32 |
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