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 5895-00-762-1856
NSN 6130-01-542-2874
NSN 2925-00-833-9466
NSN 6220-00-772-8129
NSN 5835-01-346-1386
NSN 6145-00-228-2207
NSN 5915-01-550-3416
NSN 5925-01-103-4734
NSN 5855-01-541-1361
NSN 5965-01-198-3256
NSN 5855-00-256-5562
NSN 5905-00-324-9114