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 5895-01-332-6248
NSN 6135-00-152-8729
NSN 6685-01-437-7685
NSN 5835-01-495-0595
NSN 6105-00-258-2157
NSN 6130-01-226-8168
NSN 5905-00-184-9770
NSN 6135-01-528-6896
NSN 6130-01-108-4335
NSN 5996-00-472-9157
NSN 5945-01-471-0410
NSN 6150-01-023-7710