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 5996-01-381-6564
NSN 5945-01-032-6885
NSN 5905-01-158-5549
NSN 6650-01-196-4667
NSN 6240-01-360-0225
NSN 5920-01-285-2765
NSN 2925-01-436-7325
NSN 6620-01-538-2294
NSN 6610-00-061-7882
NSN 5925-00-529-0441
NSN 5935-01-518-5544
NSN 6145-01-444-8956