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 5998-00-394-4948
NSN 5930-01-547-5226
NSN 2925-00-624-6931
NSN 5925-01-468-6567
NSN 5975-01-475-8781
NSN 7035-01-594-0182
NSN 5999-00-124-5097
NSN 6135-01-481-7400
NSN 4140-00-269-5795
NSN 5935-01-513-8861
NSN 6105-01-414-8829
NSN 6320-01-019-1028