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 5999-00-011-6357
NSN 5999-01-348-3529
NSN 6650-01-555-8349
NSN 6610-00-811-6072
NSN 5905-01-211-6643
NSN 6105-01-517-7797
NSN 6320-00-456-2092
NSN 5855-00-014-5008
NSN 5910-01-370-2304
NSN 5996-01-597-1682
NSN 6105-01-400-4194
NSN 2925-01-147-6688