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 6320-01-611-4918
NSN 6220-00-542-4898
NSN 5999-01-401-5322
NSN 5915-01-227-6881
NSN 5965-01-317-6077
NSN 6645-00-888-5820
NSN 6220-01-596-9594
NSN 5945-00-597-5722
NSN 5930-01-370-1220
NSN 6320-01-370-4218
NSN 6220-00-464-8724
NSN 5855-01-441-3189