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 5965-01-113-7400
NSN 6685-00-177-6491
NSN 4140-00-458-2662
NSN 5945-01-387-7949
NSN 5975-01-257-5168
NSN 6145-01-496-6087
NSN 5975-01-634-0678
NSN 5998-01-403-2586
NSN 5965-00-764-1841
NSN 6135-01-091-6021
NSN 5990-00-394-3987
NSN 7035-01-354-4318