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 5935-00-472-9962
NSN 6150-01-023-8630
NSN 5945-00-402-9039
NSN 5975-01-541-6093
NSN 5925-00-498-1860
NSN 5920-01-515-6839
NSN 6645-00-434-8793
NSN 7035-00-104-7613
NSN 5975-01-294-2134
NSN 5960-01-196-9203
NSN 5960-01-095-5002
NSN 6220-01-295-0626