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 5998-00-054-9124
NSN 6650-00-231-2744
NSN 5965-01-079-7939
NSN 5999-01-347-6765
NSN 6130-01-541-0017
NSN 7035-01-398-9581
NSN 5945-01-065-9004
NSN 5920-00-171-2347
NSN 5990-00-781-2575
NSN 6145-00-088-5884
NSN 5925-01-150-8127
NSN 6645-01-383-6514