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 7035-00-153-3826
NSN 4140-01-584-5913
NSN 6150-01-004-2238
NSN 5930-01-005-3973
NSN 5910-01-432-1246
NSN 5935-00-610-1901
NSN 5965-00-330-9672
NSN 5998-00-081-1454
NSN 6130-01-354-9306
NSN 5905-00-960-7643
NSN 6220-01-516-4737
NSN 5910-01-418-0991