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 5915-01-594-3616
NSN 5920-01-303-4484
NSN 2925-01-072-7101
NSN 5935-00-642-5798
NSN 5935-00-079-0084
NSN 5930-00-704-8207
NSN 5920-00-615-3915
NSN 5925-01-048-9216
NSN 6650-00-276-7541
NSN 6135-01-231-4809
NSN 6685-00-198-3364
NSN 5945-01-632-6960