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 5895-00-114-3418
NSN 5996-01-377-3743
NSN 7035-00-264-7543
NSN 5895-01-359-2752
NSN 5985-01-249-3371
NSN 5975-01-350-3244
NSN 5996-01-069-0455
NSN 6110-00-237-4862
NSN 6110-01-078-3125
NSN 5925-01-332-3266
NSN 6240-01-465-1355
NSN 2925-01-443-5929