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 5985-01-437-6150
NSN 5960-01-491-9916
NSN 7035-01-255-2332
NSN 6135-01-156-4627
NSN 5895-01-415-9573
NSN 6240-00-777-1878
NSN 5950-00-805-7864
NSN 6645-01-425-2330
NSN 5975-00-521-7598
NSN 5960-01-307-6692
NSN 5835-00-327-6192
NSN 6240-01-463-3132