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 5996-01-110-6790
NSN 6685-01-537-3208
NSN 6150-01-159-6105
NSN 5960-01-654-4353
NSN 6650-01-264-3045
NSN 6240-01-436-9868
NSN 6685-01-486-3568
NSN 5855-01-224-7975
NSN 5975-01-011-7239
NSN 6620-00-538-8746
NSN 6650-01-481-3618
NSN 5945-00-782-1799