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 5960-00-800-9215
NSN 5910-00-737-8234
NSN 6135-01-154-3526
NSN 5998-01-107-7976
NSN 5925-01-468-6567
NSN 6130-00-448-2911
NSN 5915-01-443-3881
NSN 6650-01-219-9411
NSN 5930-01-421-2715
NSN 5950-01-184-7975
NSN 5975-00-927-4982
NSN 6650-00-364-7866