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 6135-00-756-6149
NSN 5998-01-197-8328
NSN 6320-01-569-2672
NSN 5915-00-093-0379
NSN 6130-01-628-2308
NSN 5895-01-321-0340
NSN 5950-01-620-5640
NSN 6150-01-386-2813
NSN 6650-00-393-0447
NSN 5960-01-564-5044
NSN 2925-00-912-0580
NSN 6130-00-595-5943