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 6650-01-030-0238
NSN 6320-00-476-6898
NSN 5925-01-168-9670
NSN 5985-01-462-1845
NSN 5945-01-381-2038
NSN 5960-00-266-6741
NSN 5905-01-146-3253
NSN 5999-00-570-5530
NSN 6110-01-549-6184
NSN 5985-00-141-3921
NSN 5920-00-174-1657
NSN 5835-00-482-0924