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 7035-00-585-2113
NSN 6220-01-406-3167
NSN 6150-01-441-9574
NSN 5895-01-455-3483
NSN 5960-01-031-7992
NSN 6620-01-526-2857
NSN 5950-01-315-1397
NSN 6620-01-343-4920
NSN 5905-00-539-5956
NSN 5915-00-756-2699
NSN 6130-01-429-0880
NSN 5999-01-170-9284