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 5935-01-605-6385
NSN 6145-00-226-1194
NSN 5996-00-196-7258
NSN 5930-01-555-8749
NSN 6650-01-179-3823
NSN 5996-01-440-9660
NSN 6150-01-398-7309
NSN 5998-00-180-5831
NSN 6135-01-282-4326
NSN 6620-01-095-8937
NSN 4140-01-025-1555
NSN 6685-01-277-3946