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 6240-01-354-7103
NSN 5990-00-229-4647
NSN 5920-01-529-0741
NSN 5960-00-932-1428
NSN 5990-01-032-0710
NSN 6110-01-421-2308
NSN 5895-01-359-4279
NSN 7035-00-421-8710
NSN 6130-00-148-8784
NSN 6320-01-116-3980
NSN 4140-01-202-7853
NSN 6240-00-065-1437