| 
                            
                                |  |  
                                |   |  
		                        | National Stock Number:
 1240-01-467-6876
 
 Federal Supply Class:
 1240
 
 National Item Identification Number:
 014676876
 
 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.
 |  
		                        | 
 Manufacturer Information:
 
 | 9376016 | 19200 | US ARMY ARDEC RDECOM | 
 |  
					            | 
 Techincal Specification:
 
 | MATERIAL | ALUMINUM |  | SPECIAL FEATURES | INSIDE TOP RING UNPAINTED; CHROMATE CONVERSION PROTECTIVE FINISH | 
 |  |