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 5920-01-441-2286
NSN 6110-00-936-5024
NSN 5910-00-356-2086
NSN 5960-01-577-5682
NSN 5945-01-072-7114
NSN 6105-01-329-6246
NSN 5915-01-464-9733
NSN 5905-01-449-8154
NSN 5925-00-806-7493
NSN 2925-00-993-7715
NSN 6110-01-113-6968
NSN 6645-00-276-7544