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 6105-01-265-8693
NSN 5930-00-033-6729
NSN 5960-01-345-3464
NSN 5915-01-601-4993
NSN 5915-00-378-5585
NSN 5998-01-092-6692
NSN 6610-01-210-2051
NSN 5855-00-494-9581
NSN 5915-01-260-8652
NSN 6320-01-652-3806
NSN 5920-00-875-4100
NSN 5960-01-262-5048