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 5915-00-597-0038
NSN 6240-01-297-4329
NSN 6650-00-702-3560
NSN 6620-01-327-7273
NSN 5990-00-155-2306
NSN 5965-01-444-1322
NSN 5915-00-097-6321
NSN 5990-00-734-7285
NSN 5835-00-174-7763
NSN 6685-01-420-4854
NSN 5905-01-431-9807
NSN 6110-01-480-7224