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 6130-00-772-6725
NSN 5996-01-633-7979
NSN 5835-01-645-2892
NSN 6685-01-476-8560
NSN 5945-01-556-5893
NSN 6110-01-508-3779
NSN 5915-01-100-5834
NSN 5910-00-409-1634
NSN 6145-01-365-5018
NSN 6645-01-201-5802
NSN 6620-01-308-5723
NSN 5990-00-944-3568