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 6650-00-111-3399
NSN 2925-01-474-3363
NSN 5920-00-665-3973
NSN 6320-00-194-4252
NSN 6135-01-559-3092
NSN 5925-01-177-7423
NSN 5945-01-392-0898
NSN 5925-01-310-2817
NSN 5935-01-594-3702
NSN 6240-00-573-7514
NSN 5910-01-502-5860
NSN 5975-01-469-3784