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.
NSN 5998-01-258-5928
NSN 5915-00-733-5893
NSN 6105-00-824-4118
NSN 5990-01-372-6047
NSN 2925-00-408-9829
NSN 5895-00-456-0830
NSN 5999-01-110-3513
NSN 5965-00-098-8918
NSN 6685-01-659-9949
NSN 5910-01-461-8248
NSN 5855-01-327-5129
NSN 5855-01-409-1792