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 6685-00-916-1281
NSN 5925-01-428-7667
NSN 6240-00-898-9896
NSN 6105-01-277-2561
NSN 6110-01-524-3434
NSN 5998-01-462-6093
NSN 5965-01-559-1056
NSN 6110-01-044-4978
NSN 5835-00-262-6146
NSN 5855-01-213-0783
NSN 6620-00-030-7759
NSN 5930-01-488-1254