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 5985-00-940-8129
NSN 5895-00-477-7455
NSN 6645-00-248-5434
NSN 5965-00-185-9687
NSN 5910-00-166-7483
NSN 5935-00-258-0063
NSN 5855-00-930-9478
NSN 5915-00-497-0894
NSN 5999-01-227-2107
NSN 5835-01-098-4289
NSN 6110-01-647-4111
NSN 5905-01-382-9375