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 6650-00-603-3296
NSN 6240-01-160-8975
NSN 6130-01-267-3473
NSN 6320-00-731-6134
NSN 6145-01-508-3176
NSN 6650-01-571-2778
NSN 6685-01-430-7167
NSN 6135-01-528-6896
NSN 6105-01-512-7888
NSN 6650-01-549-7276
NSN 5999-01-317-3160
NSN 5920-01-280-2168