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 6320-01-319-3275
NSN 5985-01-421-4082
NSN 5999-01-426-3992
NSN 5935-01-363-8486
NSN 6145-01-485-3743
NSN 5915-00-837-4460
NSN 6145-00-971-8284
NSN 5835-01-572-9308
NSN 5998-01-023-2153
NSN 5930-01-440-9878
NSN 5915-01-247-3558
NSN 5990-00-242-3754