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		                        | National Stock Number:
 1240-01-190-8566
 
 Federal Supply Class:
 1240
 
 National Item Identification Number:
 011908566
 
 Description:
 CELL,OPTICAL ELEMENT
 
 Detail:
 A CYLINDRICAL ITEM SPECIFICALLY DESIGNED TO HOLD A LENS, RETICLE, OR WINDOW IN AN OPTICAL SYSTEM. INCLUDES ECCENTRIC CELLS AND/OR RINGS DESIGNED TO BE ROTATED WITHIN THE INSTRUMENT TO SHIFT AN OPTICAL ELEMENT TO A PRESCRIBED POSITION.
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 Manufacturer Information:
 
 | 8615905 | 19200 | US ARMY ARDEC RDECOM | 
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 Techincal Specification:
 
 | CHAMFER LOCATION | OPPOSITE DRIVE END |  | CHAMFER SIZE | 0.21875 IN. BY 45.0 DEG. |  | CUBIC MEASURE | 5.22218 CUBIC INCHES |  | ECCENTRIC CONSTRUCTION | NOT PROVIDED |  | MATERIAL | STEEL CORROSION RESISTING |  | OVERALL DIAMETER | 2.450 INCHES NOMINAL |  | OVERALL LENGTH | 0.870 INCHES NOMINAL |  | SCREW THREAD SERIES DESIGNATOR | UNS |  | SPECIAL FEATURES | MATERIAL IS TYPE 303 OR 303SE,CONDTN A,PER QQ-S-764; SURFACE ROUGHNESS IS 125.000 MICROINCHES |  | THREAD CLASS | 2A AND 2B |  | THREAD DIRECTION | RIGHT-HAND |  | THREAD LENGTH | 0.4375 INCHES |  | THREAD LOCATION | EXTERNAL AND INTERNAL |  | THREAD SIZE | 2.125-32 AND 1.750-32 | 
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