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National Stock Number:
6650-00-499-2802
Federal Supply Class:
6650
National Item Identification Number:
004992802
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:
| 012522 | 34228 | L3 TECHNOLOGIES, INC. | | C685-17 | 34228 | L3 TECHNOLOGIES, INC. | | C687-17 | 34228 | L3 TECHNOLOGIES, INC. |
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Techincal Specification:
| APERTURE DIAMETER | 2.954 INCHES NOMINAL | | GROOVE DIAMETER | 3.270 INCHES NOMINAL | | GROOVE LOCATION | INSIDE FACE OF FLANGE | | INNER GROOVE WIDTH | 0.060 INCHES NOMINAL | | INTERNAL FLANGE THICKNESS | 0.219 INCHES NOMINAL | | OUTSIDE DIAMETER | 4.688 INCHES NOMINAL | | OVERALL LENGTH | 2.343 INCHES NOMINAL | | MATERIAL | ALUMINUM ALLOY 6061 | | SPECIAL FEATURES | 32 PITCH ANTI-REFLECTION THREAD INSIDE SURFACE OF BOTH ENDS,SIX EA HOLES 0.1540 IN. DIA. DRILLED THROUGH EXTERNAL FLANGE,EXTERNAL FLANGE HAS TWO EA RECTANGLE MILLED AREAS 1.812 IN. FROM CENTER OF RING DIA TO OUTER EDGE OFFLANGE AND 1.000 IN. WIDE,1 EA HOLE 0.110 IN. DIA. DRILLE THROUGH EXTERNAL FLANGE,2 EA HOLES 0.188 IN. DIA DRILLED THROUGH BODY OF RING | | SCREW THREAD SERIES DESIGNATOR | UNS | | THREAD CLASS | 3B | | THREAD LENGTH | 0.472 INCHES | | THREAD LOCATION | INTERNAL | | THREAD SIZE | 3.250 IN.-32 |
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