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 5945-01-381-2038
NSN 6320-01-433-1210
NSN 6685-00-905-5601
NSN 5998-00-283-7348
NSN 5905-00-339-2015
NSN 6610-00-925-5064
NSN 6685-00-222-2932
NSN 5935-01-305-5218
NSN 5990-01-136-4068
NSN 5990-01-172-4553
NSN 5855-01-634-0259
NSN 5965-01-111-6031