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 5950-00-801-4491
NSN 5930-01-492-6870
NSN 5855-01-334-6594
NSN 5935-00-524-4705
NSN 6320-00-731-6134
NSN 6650-01-440-9215
NSN 5965-01-239-4034
NSN 5975-01-246-3436
NSN 5999-01-462-1501
NSN 5960-01-206-0743
NSN 5925-01-028-6504
NSN 5990-00-890-3822