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 2925-01-079-6229
NSN 6105-01-486-5116
NSN 5998-00-910-8772
NSN 5905-01-114-2297
NSN 6620-00-229-2728
NSN 6135-00-823-3034
NSN 6130-00-070-2998
NSN 5930-01-056-9598
NSN 5915-01-478-2903
NSN 5930-00-944-1764
NSN 6610-01-229-3679
NSN 2925-01-228-6554