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 6135-01-647-0386
NSN 5990-01-443-2931
NSN 6240-01-189-0184
NSN 5965-01-448-0018
NSN 6610-01-141-7014
NSN 4140-01-277-6355
NSN 5895-00-518-4954
NSN 6110-01-464-3471
NSN 2925-01-455-1270
NSN 6145-01-487-6322
NSN 5920-01-172-8509
NSN 4140-00-329-8404