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 6110-00-098-6768
NSN 6645-01-440-7180
NSN 6150-00-247-6246
NSN 5930-01-318-4505
NSN 5905-01-158-6387
NSN 5996-01-237-1331
NSN 6240-00-372-4841
NSN 5915-00-678-4802
NSN 6650-01-508-3651
NSN 5920-01-139-4384
NSN 6145-01-056-5515
NSN 5915-01-120-7908