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 5965-01-439-4839
NSN 5960-01-030-2792
NSN 6130-01-569-8033
NSN 6320-01-530-0588
NSN 5965-01-022-3298
NSN 6320-01-255-2096
NSN 5998-01-258-3504
NSN 6135-01-483-1501
NSN 5998-01-177-3441
NSN 6650-00-658-9627
NSN 5960-01-605-9921
NSN 6130-00-587-7062