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 5855-01-545-3659
NSN 6130-01-568-8533
NSN 5990-01-309-0048
NSN 5945-01-180-2742
NSN 5930-01-371-2515
NSN 6150-01-390-7824
NSN 7035-00-753-0695
NSN 6145-01-107-6135
NSN 5835-00-624-1548
NSN 6105-01-032-4706
NSN 5915-00-466-2840
NSN 5930-01-021-0864