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 5960-01-274-3900
NSN 5996-01-552-0480
NSN 6135-00-305-2052
NSN 5835-01-106-1456
NSN 5985-01-354-7569
NSN 6620-01-505-3496
NSN 5835-01-576-5307
NSN 6220-01-465-6405
NSN 6685-00-146-2308
NSN 6220-00-891-3362
NSN 5915-00-719-4099
NSN 4140-00-960-6573