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 5960-01-585-6385
NSN 6150-01-495-2021
NSN 4140-00-113-1279
NSN 6685-01-407-6008
NSN 6220-01-627-3453
NSN 5835-00-930-8500
NSN 6620-00-728-3445
NSN 5945-01-569-6674
NSN 5990-00-032-6334
NSN 2925-01-254-3068
NSN 5835-00-422-1441
NSN 4140-00-686-4894