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 6130-00-369-6637
NSN 5925-01-401-5314
NSN 6150-01-434-7013
NSN 5960-01-049-4374
NSN 5920-00-584-4592
NSN 5935-00-169-4271
NSN 5835-01-386-4027
NSN 6240-00-132-0955
NSN 5990-01-493-4039
NSN 6150-00-881-3439
NSN 5998-01-012-5053
NSN 5985-01-616-7153