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 6240-01-008-5267
NSN 6320-01-421-3777
NSN 6650-01-358-2827
NSN 5925-00-394-6894
NSN 6685-01-467-2493
NSN 6685-01-175-5844
NSN 6610-00-811-6072
NSN 5920-01-608-4109
NSN 5985-00-136-8330
NSN 5965-01-053-0475
NSN 6110-01-379-6257
NSN 5935-01-360-5443