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 6320-00-908-6841
NSN 6150-01-599-8957
NSN 5835-01-561-2959
NSN 5996-01-542-9499
NSN 5915-01-103-0823
NSN 5999-00-407-2888
NSN 6110-01-354-7515
NSN 5910-01-147-5895
NSN 6130-01-064-8964
NSN 5895-01-305-6908
NSN 5960-01-373-5313
NSN 7035-01-026-0117