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 5996-00-642-7606
NSN 5835-01-076-4091
NSN 4140-00-910-3425
NSN 5950-00-175-8175
NSN 5910-01-217-6986
NSN 6145-00-366-5790
NSN 5990-00-807-3623
NSN 5985-01-511-0599
NSN 7035-01-338-2994
NSN 5930-00-553-2643
NSN 5905-00-866-4400
NSN 7035-01-449-1189