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 6135-00-470-7779
NSN 5950-00-378-9959
NSN 6685-00-513-9462
NSN 5945-01-236-5000
NSN 5990-01-485-0260
NSN 5925-01-521-3915
NSN 5895-01-559-5605
NSN 5895-00-203-2379
NSN 6220-00-487-4424
NSN 6240-01-414-6074
NSN 6105-01-355-0061
NSN 5910-01-372-0804