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National Stock Number:
1240-01-233-9488
Federal Supply Class:
1240
National Item Identification Number:
012339488
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:
| 13083237 | 04939 | LOCKHEED MARTIN CORPORATION | | 13083237 | 58260 | PROGRAM MANAGER ADVANCED ATTACK HELICOPTER BARCOM AMCPM-AAH |
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Techincal Specification:
| APERTURE DIAMETER | 1.245 INCHES MINIMUM AND 1.255 INCHES MAXIMUM | | INTERNAL FLANGE THICKNESS | 0.027 INCHES MINIMUM AND 0.037 INCHES MAXIMUM | | OUTSIDE DIAMETER | 2.115 INCHES MINIMUM AND 2.125 INCHES MAXIMUM | | MATERIAL | ALUMINUM ALLOY 6061 | | MOUNTING CONFIGURATION | THREE HOLES EQUALLY SPACED ON 1.745 IN. MINIMUM 1.755 IN. MAXIMUM DIAMETER CIRCLE,0.139 IN. MINIMUM 0.145 IN. MAXIMUM DIAMETER |
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