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 5945-01-022-6816
NSN 5935-01-024-1073
NSN 7035-01-458-7762
NSN 5960-00-908-7622
NSN 5835-01-201-4375
NSN 5835-01-147-7526
NSN 5975-01-521-0882
NSN 5999-00-878-1381
NSN 6620-00-810-6774
NSN 6320-01-181-9474
NSN 5835-01-172-5884
NSN 6240-01-272-9019