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 6645-00-754-4108
NSN 6240-01-167-5979
NSN 6105-01-254-9359
NSN 4140-00-511-1828
NSN 6130-01-131-9369
NSN 5985-01-228-6619
NSN 5945-00-457-8964
NSN 6620-01-089-4416
NSN 6320-01-093-5738
NSN 5835-01-584-8538
NSN 6130-01-455-7828
NSN 6135-00-078-9931