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 5855-00-221-9435
NSN 4140-01-444-9815
NSN 6220-00-113-3166
NSN 5945-01-056-6437
NSN 6320-01-312-3620
NSN 7035-00-048-3723
NSN 5960-01-232-7447
NSN 5895-01-024-9287
NSN 6130-00-618-2712
NSN 6105-00-119-2212
NSN 6145-01-379-8662
NSN 5935-00-161-3429