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 6130-00-187-6457
NSN 6135-00-856-1343
NSN 5920-00-372-5864
NSN 5930-01-423-9415
NSN 7035-01-449-1846
NSN 5855-01-545-3659
NSN 6320-00-116-3658
NSN 5935-00-151-4910
NSN 5965-00-368-8204
NSN 5998-01-250-5152
NSN 5975-00-141-0554
NSN 6240-01-616-3334