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 5960-00-840-5465
NSN 6240-01-294-3988
NSN 5999-00-840-9267
NSN 7035-01-313-3677
NSN 5975-00-647-4968
NSN 5945-01-202-1726
NSN 5965-01-426-5283
NSN 6240-01-603-7856
NSN 5835-01-652-0168
NSN 5910-01-195-8392
NSN 6240-01-116-3382
NSN 5905-01-392-5977