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 5895-01-306-8515
NSN 6220-00-244-2040
NSN 6130-01-246-2064
NSN 5965-00-997-5764
NSN 5990-01-161-4625
NSN 6650-00-520-5785
NSN 6650-01-425-2572
NSN 5895-01-374-3506
NSN 5910-00-128-0414
NSN 5990-01-216-1276
NSN 5835-00-546-4898
NSN 6145-01-311-2535