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 5835-00-008-9619
NSN 6105-01-176-3425
NSN 6650-00-408-4972
NSN 6110-01-146-4183
NSN 5999-01-426-8740
NSN 6110-01-252-9619
NSN 5996-01-382-2114
NSN 6145-00-849-3897
NSN 5985-01-330-6793
NSN 5950-01-649-7372
NSN 2925-00-234-7918
NSN 6145-01-380-0732