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 7035-00-946-2642
NSN 6620-01-173-0009
NSN 6110-00-792-7922
NSN 6110-01-633-9660
NSN 6105-01-654-0158
NSN 6105-01-634-0322
NSN 7035-01-150-6303
NSN 5996-00-816-9320
NSN 6135-01-210-8715
NSN 5915-01-135-5677
NSN 5945-01-282-6061
NSN 6135-01-061-1862