| 
                                    
                                 | 
                             
                            
                                
                                     
                                 | 
                             
		                    
		                        
		                             National Stock Number: 6650-01-170-4392
  Federal Supply Class: 6650
  National Item Identification Number: 011704392
  Description: LENS,OPTICAL INSTRUMENT
  Detail: An unmounted, transparent, color free lens which may be treated with a low reflection coating to increase light transmission. Includes single and compound elements. For items having two plane parallel surfaces, see WINDOW, OPTICAL INSTRUMENT. Excludes RETICLE, OPTICAL INSTRUMENT. 
		                         | 
		                     
		                    
		                        
                                    
  Manufacturer Information:
 | 13074881 | 04939 | LOCKHEED MARTIN CORPORATION |  | 13074881 | 58260 | PROGRAM MANAGER ADVANCED ATTACK HELICOPTER BARCOM AMCPM-AAH |   
		                         | 
		                     
				            
					            
						            
  Techincal Specification:
 | AXIAL THICKNESS | 0.024 INCHES NOMINAL |  | DIAMETER | 1.066 INCHES NOMINAL |  | ELEMENT LEFT SURFACE RADIUS | 2.022 INCHES |  | ELEMENT RIGHT SURFACE RADIUS | 2.022 INCHES |  | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE |  | MATERIAL | GLASS OPTICAL |  | SINGLE LENS STYLE | DOUBLE CONCAVE |   
					             | 
				             
		                 
		             |