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 2925-01-345-5463
NSN 5945-00-542-3569
NSN 5935-00-759-2781
NSN 5855-01-430-9689
NSN 5930-01-177-4002
NSN 2925-00-891-9289
NSN 6685-00-228-1507
NSN 5835-01-368-1013
NSN 6130-01-450-2776
NSN 6650-01-250-3989
NSN 5965-01-267-5263
NSN 6645-00-117-9839