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 2925-00-933-0200
NSN 5835-00-907-4390
NSN 5935-01-311-3331
NSN 6240-00-269-3346
NSN 6620-01-239-9564
NSN 6105-01-654-8162
NSN 6135-00-982-1882
NSN 5925-01-502-6475
NSN 5925-01-282-5518
NSN 5920-01-260-9234
NSN 5975-01-642-0838
NSN 6105-00-638-6230