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 6105-00-719-5368
NSN 5960-01-323-6432
NSN 5990-00-103-0528
NSN 5905-01-317-9361
NSN 5998-01-379-6599
NSN 6645-01-012-7670
NSN 5855-01-147-4785
NSN 5999-00-619-8124
NSN 6145-01-297-2835
NSN 5910-01-525-8024
NSN 6150-01-160-1790
NSN 6650-00-283-0978