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 6145-00-281-8161
NSN 7035-01-218-4233
NSN 5999-00-419-9890
NSN 6150-00-142-9142
NSN 6645-01-076-4655
NSN 6150-01-023-1516
NSN 6620-01-128-3053
NSN 5999-00-958-9261
NSN 5965-01-312-1630
NSN 6240-01-600-7489
NSN 6135-00-643-4843
NSN 5965-01-616-7655