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 6610-01-344-9239
NSN 5985-00-010-0645
NSN 6610-01-061-8466
NSN 6620-01-562-0615
NSN 6105-01-418-4321
NSN 5998-01-029-2161
NSN 6135-01-344-9766
NSN 6650-00-427-7858
NSN 6320-00-160-0899
NSN 5855-01-384-3314
NSN 5835-00-135-9528
NSN 5985-01-508-8190