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 6150-00-451-4984
NSN 6650-01-045-5494
NSN 7035-00-731-8729
NSN 6610-00-425-7684
NSN 5998-00-102-4839
NSN 5930-01-545-7816
NSN 5999-01-276-0499
NSN 6220-01-089-8839
NSN 6110-01-020-8153
NSN 5855-01-277-1663
NSN 6320-01-355-2929
NSN 2925-00-999-8967