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 5999-01-472-2536
NSN 5910-00-857-1798
NSN 6135-01-386-1452
NSN 5905-00-471-8209
NSN 5985-00-099-3991
NSN 5945-01-477-5214
NSN 5935-00-781-6847
NSN 5915-00-636-9785
NSN 6110-01-010-4551
NSN 6135-01-386-5709
NSN 5920-01-232-1453
NSN 5835-00-939-7470