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 6220-01-478-8702
NSN 6650-00-342-6447
NSN 5996-01-397-4900
NSN 6220-01-442-5159
NSN 6685-01-114-8047
NSN 5905-00-056-2194
NSN 6150-01-628-4697
NSN 5835-01-364-6830
NSN 5855-00-281-3843
NSN 5998-01-449-2040
NSN 5835-01-416-6455
NSN 5998-01-547-3377