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National Stock Number:
1240-00-179-6427
Federal Supply Class:
1240
National Item Identification Number:
001796427
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:
| 929C962P1 | 89954 | BAE SYSTEMS CONTROLS INC. |
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Techincal Specification:
| APERTURE DIAMETER | 4.090 INCHES MINIMUM AND 4.110 INCHES MAXIMUM | | INTERNAL FLANGE THICKNESS | 0.042 INCHES NOMINAL | | OUTSIDE DIAMETER | 4.885 INCHES MINIMUM AND 4.895 INCHES MAXIMUM | | MATERIAL | ALUMINUM ALLOY 6061 |
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