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 5855-01-581-3570
NSN 5930-00-580-1665
NSN 2925-01-545-2717
NSN 5960-00-078-8074
NSN 5998-01-605-2944
NSN 5855-01-546-9423
NSN 5925-01-557-9007
NSN 5985-01-248-8712
NSN 6150-00-758-5490
NSN 7035-01-542-7946
NSN 6130-01-100-3830
NSN 6240-00-874-3533