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 5915-01-158-1092
NSN 5855-00-688-9954
NSN 6240-01-537-0629
NSN 5945-01-453-4883
NSN 4140-01-448-8507
NSN 6240-00-883-8484
NSN 5975-01-181-5679
NSN 5910-01-070-5295
NSN 5925-01-231-4487
NSN 6685-00-945-3093
NSN 6645-00-163-3084
NSN 6105-01-131-6596