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 6130-01-364-9916
NSN 5910-01-049-4967
NSN 5835-00-054-4312
NSN 5855-00-156-5489
NSN 5960-00-721-1744
NSN 6110-01-116-2348
NSN 6150-00-400-9151
NSN 5895-00-679-8606
NSN 6645-01-358-4907
NSN 6610-01-209-5798
NSN 6135-01-364-2738
NSN 5975-01-268-4757