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 4140-01-234-1187
NSN 5996-01-254-2510
NSN 5835-01-303-6563
NSN 5855-01-475-7061
NSN 5915-01-573-5980
NSN 5960-01-538-2082
NSN 5895-01-059-5610
NSN 5985-01-392-9238
NSN 6105-01-634-0322
NSN 5895-01-202-8748
NSN 6650-01-443-1476
NSN 6685-01-296-3917