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 5915-01-487-6454
NSN 5905-00-608-5713
NSN 5895-00-160-7660
NSN 6240-01-492-7194
NSN 5925-00-703-3627
NSN 6135-00-209-6918
NSN 6620-01-533-1059
NSN 5935-01-024-1904
NSN 6610-01-256-7938
NSN 5915-01-244-1793
NSN 6320-01-631-7828
NSN 5855-00-688-9954