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 5935-00-983-5992
NSN 6240-01-353-7760
NSN 5945-01-446-7074
NSN 7035-01-364-8454
NSN 6650-01-244-1573
NSN 5999-01-100-4658
NSN 5905-01-386-3077
NSN 6110-00-768-7583
NSN 6110-00-824-5764
NSN 5965-01-340-3723
NSN 6145-00-033-2997
NSN 5999-01-124-1926