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 5975-00-505-2626
NSN 6645-01-484-4158
NSN 5895-01-370-5045
NSN 5985-00-563-7685
NSN 5999-01-163-2764
NSN 5855-01-317-5354
NSN 6130-01-164-5041
NSN 6110-01-264-8687
NSN 5920-00-699-1927
NSN 6650-01-414-4946
NSN 5975-01-131-0770
NSN 6105-00-443-8245