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 6610-00-614-1703
NSN 2925-01-144-7106
NSN 6320-01-180-9908
NSN 5920-00-518-1789
NSN 5960-01-199-6953
NSN 5985-01-125-4166
NSN 4140-01-419-5976
NSN 7035-01-442-6993
NSN 5920-01-496-2513
NSN 6685-01-498-6232
NSN 6650-01-093-1803
NSN 7035-01-085-5955