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 5998-00-123-7474
NSN 5985-00-812-4676
NSN 5930-00-372-5642
NSN 6145-01-359-2378
NSN 5965-00-252-6014
NSN 6685-01-607-3199
NSN 5915-01-342-4680
NSN 5915-01-246-3580
NSN 5945-01-580-6831
NSN 6110-00-921-1024
NSN 6130-00-551-8316
NSN 4140-00-192-0269