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 5855-00-149-0766
NSN 5998-01-332-2032
NSN 5998-01-580-6896
NSN 5855-00-688-9954
NSN 2925-01-567-8027
NSN 7035-01-474-2768
NSN 5930-01-546-3300
NSN 6320-01-412-2973
NSN 5935-01-382-9370
NSN 7035-01-463-3368
NSN 5905-01-369-9498
NSN 5930-01-630-0089