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 5855-00-444-2298
NSN 6220-01-277-3591
NSN 7035-00-225-1961
NSN 5960-00-246-4623
NSN 4140-00-385-2925
NSN 4140-00-120-1203
NSN 7035-00-541-8516
NSN 6105-00-527-2193
NSN 6220-01-425-1132
NSN 6240-00-882-8487
NSN 2925-01-161-7440
NSN 5910-00-926-0111