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 7035-01-620-2082
NSN 5965-01-578-9964
NSN 5999-00-189-0772
NSN 5935-01-424-5001
NSN 6135-00-575-8942
NSN 5910-00-258-8383
NSN 5985-01-222-0039
NSN 6145-00-503-6301
NSN 6645-00-551-8291
NSN 5915-01-155-7086
NSN 6620-01-292-5072
NSN 5920-01-056-2818