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 6240-01-468-6408
NSN 5950-00-960-6799
NSN 7035-00-860-9645
NSN 6610-01-632-8561
NSN 5996-01-412-0813
NSN 6135-01-190-2628
NSN 6240-01-495-9845
NSN 5855-00-198-3197
NSN 6135-00-998-5884
NSN 6645-01-069-8608
NSN 5905-01-237-3852
NSN 5895-00-275-0605