A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. It may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. It is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. See window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.
Classification: Articles of plastics & articles of other materials of heading 3901 to 3914, nesoi
NSN 7035-01-386-3004
NSN 5930-01-418-0676
NSN 5935-00-836-3648
NSN 6685-01-581-2726
NSN 5925-01-227-2798
NSN 5990-01-365-6016
NSN 5998-01-024-9741
NSN 5920-00-631-9281
NSN 5985-00-196-4304
NSN 5990-01-554-8547
NSN 5999-01-176-8900
NSN 6320-00-456-0836