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 6685-00-971-7406
NSN 5998-01-157-9354
NSN 4140-00-516-5002
NSN 5975-01-424-7982
NSN 2925-01-376-9236
NSN 5935-00-166-7455
NSN 6685-01-314-8568
NSN 5965-01-264-8761
NSN 6685-01-089-6798
NSN 5945-01-631-4312
NSN 4140-00-225-8586
NSN 6150-00-405-4384