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 7035-00-104-7613
NSN 5999-00-515-7354
NSN 5960-01-622-0393
NSN 6650-00-229-3790
NSN 5835-01-447-2544
NSN 5998-01-442-3206
NSN 6620-01-431-9176
NSN 6685-01-429-8922
NSN 5950-01-156-4955
NSN 6650-00-606-2882
NSN 6610-01-585-3408
NSN 6240-00-446-3700