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 5835-01-412-0344
NSN 5975-01-512-0179
NSN 6105-01-474-6262
NSN 5945-01-323-8672
NSN 6645-00-399-4551
NSN 5975-00-169-1401
NSN 6220-01-090-0126
NSN 5985-00-800-5438
NSN 5945-01-367-4624
NSN 5999-00-412-8380
NSN 6620-01-446-6571
NSN 5855-01-236-9645