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 2925-00-113-1835
NSN 5895-01-073-6914
NSN 2925-01-492-5342
NSN 5905-01-010-7081
NSN 7035-01-332-3496
NSN 6105-00-216-8067
NSN 5895-00-981-8642
NSN 6150-00-468-1885
NSN 6130-00-466-9888
NSN 5905-01-381-0638
NSN 5915-01-559-2757
NSN 5965-01-432-7134