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 5925-00-972-3000
NSN 5915-00-926-8126
NSN 5950-01-305-1821
NSN 6320-01-616-0843
NSN 5920-00-904-3727
NSN 6145-00-223-2885
NSN 6320-01-338-6006
NSN 5925-01-314-5514
NSN 6320-00-004-9158
NSN 5910-01-184-3535
NSN 6645-00-470-5310
NSN 5965-01-255-5581