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 6105-01-317-3657
NSN 5925-00-199-9565
NSN 5999-01-394-6358
NSN 5930-00-018-8187
NSN 6130-01-273-7427
NSN 5990-01-265-8082
NSN 6620-01-369-3589
NSN 6105-01-129-8826
NSN 5915-00-142-6912
NSN 6240-00-139-5367
NSN 5990-00-241-3780
NSN 6320-00-937-5625