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 6130-00-269-8273
NSN 6240-00-225-9702
NSN 6110-01-507-4452
NSN 5920-00-030-5712
NSN 6650-01-462-5879
NSN 6220-00-226-1994
NSN 5945-01-163-1475
NSN 6645-01-248-3123
NSN 6110-00-473-2101
NSN 6135-01-062-9356
NSN 6105-00-880-1471
NSN 5965-00-964-1756