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 6240-00-846-9815
NSN 5910-00-687-1254
NSN 6685-00-991-0738
NSN 5920-01-206-3977
NSN 6320-01-292-6635
NSN 5996-01-625-4270
NSN 6240-00-168-0790
NSN 5915-01-301-0882
NSN 5915-01-193-3213
NSN 5855-01-453-6384
NSN 5835-01-406-4066
NSN 6610-01-358-1161