Stress relief annealed
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 6620-01-097-1038
NSN 6650-00-134-5130
NSN 5855-00-256-5562
NSN 5905-01-074-6810
NSN 6135-01-260-7180
NSN 5945-01-141-8833
NSN 7035-01-319-7066
NSN 5985-01-233-0512
NSN 5965-01-589-1840
NSN 5855-01-053-0679
NSN 6320-01-214-0350
NSN 6650-00-872-0942