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 5925-01-278-4411
NSN 5996-01-287-8311
NSN 6105-00-152-3825
NSN 6150-01-537-5806
NSN 5895-01-150-1345
NSN 5985-01-603-0695
NSN 6610-01-067-0228
NSN 6645-00-033-8714
NSN 5915-01-510-9763
NSN 6650-01-651-9502
NSN 6110-01-577-5947
NSN 6620-01-067-8952