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 6150-01-116-2406
NSN 6150-01-065-5439
NSN 5945-01-397-0565
NSN 5895-01-646-1175
NSN 6685-01-444-2049
NSN 5945-01-534-1847
NSN 6145-01-245-8856
NSN 5999-00-106-1225
NSN 5925-01-477-4212
NSN 5895-00-735-6444
NSN 5895-00-445-2821
NSN 5945-00-186-5069