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 5925-01-604-7246
NSN 5855-01-385-8846
NSN 6145-01-470-3933
NSN 5999-01-309-9716
NSN 6620-01-481-1358
NSN 5895-01-597-0045
NSN 5999-01-269-7146
NSN 5910-01-438-0734
NSN 5920-01-014-0611
NSN 6130-00-621-7997
NSN 5965-01-340-9637
NSN 6135-00-477-8847