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 6130-01-258-0777
NSN 6130-00-674-7020
NSN 6240-01-396-4233
NSN 5960-01-062-4667
NSN 5945-01-278-9211
NSN 5895-01-545-0152
NSN 5999-01-564-2183
NSN 7035-01-286-2677
NSN 6320-01-084-8821
NSN 5925-00-916-6773
NSN 6645-01-020-4557
NSN 6135-01-597-7685