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 5990-01-303-6110
NSN 5905-01-648-6667
NSN 6610-00-641-3015
NSN 5930-00-674-8714
NSN 5985-01-196-6144
NSN 5935-01-381-0361
NSN 6220-01-389-8933
NSN 5985-00-636-8689
NSN 5996-00-829-6739
NSN 5950-01-463-7780
NSN 6135-01-278-9717
NSN 5920-01-368-3044