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 6150-01-077-2704
NSN 6240-01-033-6941
NSN 5965-01-364-7275
NSN 5960-00-707-0816
NSN 5925-01-473-8450
NSN 6220-01-500-4516
NSN 6685-01-175-5844
NSN 6645-00-274-5670
NSN 6650-00-614-1711
NSN 6110-01-535-5771
NSN 5998-01-328-8288
NSN 6650-01-441-5339