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 6220-00-200-7888
NSN 6320-01-585-8468
NSN 5835-01-343-7516
NSN 6150-01-302-5256
NSN 6320-00-456-0836
NSN 5925-00-549-2433
NSN 6130-00-182-7702
NSN 5985-01-608-1023
NSN 7035-01-445-3563
NSN 5910-01-382-8803
NSN 6110-01-363-8055
NSN 6650-00-499-0404