NSN 6650-00-499-2802

Part Details | OPTICAL ELEMENT RETAINING RING

6650-00-499-2802 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.

Alternate Parts: C68717, C687-17, C68517, C685-17, 012522, 6650-00-499-2802, 00-499-2802, 6650004992802, 004992802

Supply Group (FSG) NSN Assigned NIIN Item Name Code (INC)
66JUL 02, 197100-499-280222585 ( RING, RETAINING, OPTICAL ELEMENT )
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 6650-00-499-2802
Part Number Cage Code Manufacturer
C687-1734228L3 TECHNOLOGIES, INC.DBA L3 KEO
C685-1734228L3 TECHNOLOGIES, INC.DBA L3 KEO
01252234228L3 TECHNOLOGIES, INC.DBA L3 KEO
Technical Data | NSN 6650-00-499-2802
Characteristic Specifications
MATERIAL ALUMINUM ALLOY 6061
THREAD LOCATION INTERNAL
THREAD SIZE3.250 IN.-32
SCREW THREAD SERIES DESIGNATOR UNS
THREAD CLASS3B
THREAD LENGTH0.472 INCHES
OVERALL LENGTH2.343 INCHES NOMINAL
OUTSIDE DIAMETER4.688 INCHES NOMINAL
INTERNAL FLANGE THICKNESS0.219 INCHES NOMINAL
INNER GROOVE WIDTH0.060 INCHES NOMINAL
GROOVE DIAMETER3.270 INCHES NOMINAL
APERTURE DIAMETER2.954 INCHES NOMINAL
GROOVE LOCATION INSIDE FACE OF FLANGE
SPECIAL FEATURES32 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