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 6145-01-619-3235
NSN 6320-01-536-3077
NSN 5999-00-799-9092
NSN 5985-00-245-6548
NSN 6610-01-523-2958
NSN 5910-00-803-4732
NSN 6320-00-360-1744
NSN 5999-01-352-4582
NSN 6645-00-258-8547
NSN 5895-01-394-5469
NSN 6150-01-437-2992
NSN 5915-00-269-4463