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 6105-00-149-7956
NSN 6110-01-091-5348
NSN 5905-01-512-9136
NSN 6150-01-080-0090
NSN 5945-01-551-5149
NSN 5999-01-323-0319
NSN 5905-01-304-1528
NSN 5835-00-025-9951
NSN 6650-01-226-4819
NSN 5945-01-007-6649
NSN 7035-00-488-9765
NSN 5925-01-168-7812