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 5965-00-188-5531
NSN 6150-01-362-0526
NSN 2925-00-912-3993
NSN 6240-01-545-3608
NSN 6650-01-591-8574
NSN 5960-01-415-3574
NSN 5999-01-066-8766
NSN 6105-00-523-0403
NSN 6145-01-230-3595
NSN 6105-01-145-4464
NSN 5925-01-545-8937
NSN 5999-00-343-3724