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 6130-01-596-5774
NSN 6320-00-403-6003
NSN 6150-01-509-1076
NSN 6130-00-218-1363
NSN 5920-00-992-1820
NSN 5985-01-011-5704
NSN 6110-01-464-0673
NSN 6685-01-025-3418
NSN 5999-01-469-1319
NSN 5945-01-018-8535
NSN 6145-01-430-9247
NSN 5975-00-505-2626