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National Stock Number:
1240-00-210-4395
Federal Supply Class:
1240
National Item Identification Number:
002104395
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:
| 1390117 | 10001 | NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER | | 789PC3 | 02622 | AMERICAN OPTICAL CO | | 789PC3 | 78039 | LEICA INC SURVEYING AND PHOTOGRAMMETRY SYSTEMS DIV |
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Techincal Specification:
| APERTURE DIAMETER | 1.451 INCHES MINIMUM AND 1.457 INCHES MAXIMUM | | INTERNAL FLANGE THICKNESS | 0.020 INCHES MINIMUM AND 0.040 INCHES MAXIMUM | | OUTSIDE DIAMETER | 1.828 INCHES MINIMUM AND 1.829 INCHES MAXIMUM | | OVERALL LENGTH | 0.759 INCHES MINIMUM AND 0.765 INCHES MAXIMUM | | MATERIAL | ALUMINUM ALLOY | | MOUNTING CONFIGURATION | THREE 0.063 IN. DIA LOCK SCREWS | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.495 INCHES | | THREAD LOCATION | INTERNAL |
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