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 6150-01-100-3413
NSN 6150-01-348-8970
NSN 5895-01-013-9320
NSN 6110-01-541-0527
NSN 5930-01-645-9147
NSN 5990-01-341-5735
NSN 5996-01-322-4838
NSN 5910-00-288-1898
NSN 5935-01-471-6449
NSN 5920-01-361-8835
NSN 6645-01-023-8020
NSN 5990-01-094-7740