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: Pressed or molded glass articles, wired or not, for building or construction;leaded glass windows etc; formed multicellular or foam glass
NSN 5985-00-964-9673
NSN 6685-00-362-1649
NSN 6685-00-495-6891
NSN 6150-01-221-8565
NSN 5855-00-149-0766
NSN 5999-01-521-9803
NSN 5905-00-143-0943
NSN 6130-00-387-2051
NSN 6110-01-298-6847
NSN 5835-00-659-5204
NSN 5935-01-260-0842
NSN 5925-01-200-7255