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 5935-00-642-0626
NSN 4140-01-548-5456
NSN 5915-00-885-8579
NSN 6135-00-583-3966
NSN 6220-00-466-2681
NSN 6220-00-625-8554
NSN 6650-01-333-3646
NSN 6105-00-370-1365
NSN 6320-01-449-1014
NSN 5920-01-387-4266
NSN 5950-01-006-7865
NSN 6620-00-226-2285