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 5975-00-902-8238
NSN 5835-01-244-8532
NSN 5950-01-368-6075
NSN 5855-01-184-8089
NSN 5950-01-208-6489
NSN 7035-01-364-8454
NSN 5835-01-209-6410
NSN 6105-01-126-6438
NSN 6130-01-392-5530
NSN 6650-00-754-2276
NSN 7035-00-585-2113
NSN 5990-01-382-5364