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 6145-01-231-9169
NSN 6130-01-088-3137
NSN 5975-01-044-4039
NSN 6150-01-380-9723
NSN 6610-01-620-8868
NSN 4140-01-322-6397
NSN 5925-01-170-2838
NSN 6685-01-421-7980
NSN 6645-00-663-8111
NSN 5835-00-729-9305
NSN 6685-01-508-7797
NSN 5996-01-612-1371