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 6150-00-812-7928
NSN 6105-01-092-2362
NSN 5965-01-210-7784
NSN 5935-00-519-0281
NSN 6150-01-277-0092
NSN 5920-00-010-6652
NSN 6150-01-276-9366
NSN 5965-01-289-6436
NSN 6685-00-172-9764
NSN 6135-01-588-4160
NSN 5935-01-375-3616
NSN 6135-01-462-0731