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 5950-00-708-0292
NSN 6145-01-556-8963
NSN 5965-01-461-5444
NSN 5855-01-484-9948
NSN 6645-01-135-5449
NSN 5835-01-050-7882
NSN 5996-01-565-6661
NSN 5999-01-539-3248
NSN 7035-01-087-7727
NSN 5996-01-505-0101
NSN 2925-01-048-8464
NSN 6220-01-445-9902