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 5945-01-333-8722
NSN 5960-01-068-4003
NSN 5996-01-617-4140
NSN 6150-00-650-6790
NSN 5895-01-563-9146
NSN 6220-00-123-2870
NSN 5950-01-500-2105
NSN 5935-01-502-6935
NSN 7035-00-981-7216
NSN 6620-01-207-0667
NSN 6110-01-431-8889
NSN 5910-01-114-0489