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 6320-01-082-2970
NSN 5905-01-406-6007
NSN 6150-00-390-1363
NSN 6240-00-381-5833
NSN 5920-00-829-3634
NSN 5965-01-089-7678
NSN 6135-01-461-2915
NSN 4140-01-415-1187
NSN 7035-00-286-6221
NSN 5950-01-503-0747
NSN 7035-00-320-5644
NSN 6150-01-296-8096