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 6145-01-577-2478
NSN 5996-01-246-4675
NSN 6610-00-543-1402
NSN 6145-01-218-7198
NSN 5915-01-607-8495
NSN 5985-01-190-3098
NSN 5985-01-459-8441
NSN 5975-00-679-6738
NSN 5998-01-073-6017
NSN 5985-00-399-1174
NSN 6620-01-411-4434
NSN 2925-01-443-0590