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 5895-01-570-7486
NSN 5990-00-167-2692
NSN 5855-00-198-3197
NSN 5998-00-568-3973
NSN 6110-01-557-9732
NSN 6685-00-226-1885
NSN 5996-00-633-6912
NSN 5950-00-529-0599
NSN 5925-01-065-4091
NSN 6685-01-099-8539
NSN 4140-01-012-2460
NSN 5835-01-116-2369