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 6645-00-550-7395
NSN 5895-01-095-4291
NSN 6220-00-980-7299
NSN 5999-01-149-5826
NSN 6650-00-407-7059
NSN 5915-01-222-3363
NSN 6145-01-443-1921
NSN 5915-00-400-8401
NSN 6645-01-242-9699
NSN 6645-01-144-8627
NSN 4140-00-442-2701
NSN 5996-01-302-8776