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National Stock Number:
1240-00-931-8901
Federal Supply Class:
1240
National Item Identification Number:
009318901
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:
| 7791929 | 19200 | US ARMY ARDEC RDECOM |
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Techincal Specification:
| APERTURE DIAMETER | 0.880 INCHES MINIMUM AND 0.920 INCHES MAXIMUM | | FSC APPLICATION DATA | SIGHT,REFLEX | | GROOVE DIAMETER | 1.322 INCHES MINIMUM AND 1.330 INCHES MAXIMUM | | GROOVE LOCATION | ADJACENT TO INTERNAL FLANGE | | INNER GROOVE WIDTH | 0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM | | INTERNAL FLANGE THICKNESS | 0.060 INCHES MINIMUM AND 0.080 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-B-626,COMP 360,1/2H FED SPEC SINGLE MATERIAL RESPONSE | | MATERIAL | COPPER ALLOY 360 | | OUTSIDE DIAMETER | 1.377 INCHES MINIMUM AND 1.385 INCHES MAXIMUM | | OVERALL LENGTH | 0.340 INCHES MINIMUM AND 0.341 INCHES MAXIMUM | | SCREW THREAD SERIES DESIGNATOR | UNS | | SPECIAL FEATURES | DRILLED FACE DRIVE TYPE,TWO 0.077 IN. DIA. HOLES SPACED 180 DEG APART ON A 1.156 IN. BOLT CIRCLE DIA. ON INTERNAL FLANGE END. | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-F-495 MIL SPEC SINGLE TREATMENT RESPONSE | | SURFACE TREATMENT | OXIDE | | THREAD CLASS | 3B | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.200 INCHES | | THREAD LOCATION | INTERNAL | | THREAD SIZE | 1.312 IN.-48 |
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