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 5999-01-188-6429
NSN 5985-00-916-9616
NSN 5960-01-094-5958
NSN 6650-00-252-2541
NSN 6130-01-251-7366
NSN 5855-00-479-9819
NSN 6650-01-069-2501
NSN 5930-00-914-2491
NSN 5895-01-060-2527
NSN 6240-01-323-5386
NSN 5930-01-171-9444
NSN 6105-01-204-2920