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 5945-00-952-7900
NSN 5960-01-243-0007
NSN 5945-01-356-1263
NSN 6320-00-468-5015
NSN 6685-00-257-2988
NSN 6105-00-581-9472
NSN 6220-01-455-7591
NSN 5915-00-922-1184
NSN 6620-01-245-0184
NSN 6110-01-340-0783
NSN 5985-01-023-8011
NSN 6220-01-468-5596