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 6220-01-024-9444
NSN 5835-01-478-9428
NSN 6610-01-249-3243
NSN 5925-01-163-8562
NSN 6105-01-457-4936
NSN 6110-00-244-2308
NSN 5985-00-264-7480
NSN 7035-01-443-3052
NSN 5920-01-423-8595
NSN 6240-01-109-4680
NSN 5996-00-143-4783
NSN 5855-00-247-7219