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 5965-01-257-8926
NSN 6130-01-127-0136
NSN 5915-01-262-9733
NSN 6150-00-947-7658
NSN 6105-01-359-2962
NSN 5990-00-191-6290
NSN 5996-01-084-6930
NSN 7035-01-421-4446
NSN 5910-00-004-4972
NSN 5945-00-443-5828
NSN 5925-01-581-6192
NSN 5990-00-923-0848