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 6240-01-388-2413
NSN 6130-01-370-8707
NSN 5998-00-330-5972
NSN 6320-01-415-0953
NSN 6645-01-076-4655
NSN 6130-01-024-9060
NSN 6110-01-584-5596
NSN 6150-00-288-6245
NSN 6320-00-905-0543
NSN 5945-00-233-0818
NSN 5915-01-363-6610
NSN 4140-01-418-2640