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 5935-01-049-6673
NSN 6130-01-052-5593
NSN 5975-01-510-0479
NSN 5935-01-176-5057
NSN 5975-00-218-0414
NSN 6240-00-252-7695
NSN 5935-00-710-1717
NSN 5915-01-386-6804
NSN 5855-01-330-1217
NSN 5895-00-601-8945
NSN 5835-01-071-2814
NSN 6105-00-549-2668