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 2925-01-548-4875
NSN 5920-01-392-2277
NSN 6645-01-168-8465
NSN 6320-00-841-2279
NSN 6105-00-455-8879
NSN 2925-01-385-1763
NSN 5975-01-027-3140
NSN 5915-01-521-6706
NSN 4140-01-026-2725
NSN 5999-00-141-7682
NSN 6685-00-825-1831
NSN 6105-00-375-5771