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 6685-00-388-8821
NSN 6645-01-320-4138
NSN 2925-00-945-0792
NSN 5855-01-501-5683
NSN 5835-01-143-9143
NSN 6150-01-216-1117
NSN 5925-00-231-8668
NSN 6645-00-089-8842
NSN 6320-01-246-4390
NSN 5935-01-100-9987
NSN 6240-00-617-9599
NSN 5935-01-212-8004