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 5975-01-029-7982
NSN 6135-01-494-3607
NSN 6220-01-149-8566
NSN 5998-00-066-9680
NSN 5855-01-575-3154
NSN 5960-00-870-8262
NSN 6150-01-576-4162
NSN 5855-01-512-1926
NSN 5910-01-040-8961
NSN 5835-01-632-6627
NSN 6650-01-481-1165
NSN 6685-01-323-3610