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 6650-01-372-7577
NSN 5935-01-017-0707
NSN 5960-01-487-6436
NSN 5915-01-038-1483
NSN 5996-00-249-1104
NSN 5910-01-197-2848
NSN 6650-01-406-4959
NSN 5996-01-251-3640
NSN 5950-01-318-8334
NSN 4140-00-719-5654
NSN 5895-01-284-9197
NSN 5905-01-145-4552