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 5935-01-258-7718
NSN 5998-00-757-3306
NSN 5975-01-512-3473
NSN 5999-01-605-7679
NSN 5930-01-574-4333
NSN 5945-01-158-2377
NSN 6650-01-502-6761
NSN 5915-00-130-6562
NSN 5925-01-437-8064
NSN 5910-00-119-4498
NSN 6130-00-945-1098
NSN 6220-01-071-8437