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 6650-00-266-6808
NSN 7035-00-337-8745
NSN 5945-00-452-0503
NSN 5950-01-148-2732
NSN 6130-01-386-2894
NSN 7035-01-546-8389
NSN 6240-01-246-3248
NSN 5935-00-009-3083
NSN 6145-01-295-5288
NSN 6620-01-380-4882
NSN 5965-01-096-7825
NSN 6150-00-286-0827