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 5915-01-523-2861
NSN 6620-01-034-7636
NSN 7035-01-334-5855
NSN 5990-01-591-8797
NSN 6650-00-382-6080
NSN 6130-01-116-6432
NSN 6105-01-321-4770
NSN 6110-01-316-2648
NSN 5998-00-167-8926
NSN 5935-01-502-1093
NSN 6320-00-809-5744
NSN 6135-00-613-1068