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 6110-01-350-9354
NSN 2925-00-536-4574
NSN 5996-00-682-9204
NSN 5935-01-325-4547
NSN 5835-00-168-4258
NSN 6110-01-478-4084
NSN 5996-00-465-4730
NSN 6610-00-019-5460
NSN 5975-01-214-9735
NSN 5895-01-645-7095
NSN 5855-01-020-7982
NSN 5975-00-267-2770