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 5925-00-905-8196
NSN 6240-00-201-9011
NSN 6130-01-296-3283
NSN 5999-01-116-5325
NSN 6135-01-093-7426
NSN 6610-01-514-8898
NSN 5915-01-085-3086
NSN 5999-01-567-1939
NSN 5835-01-383-1313
NSN 6135-01-562-6582
NSN 5920-01-422-3207
NSN 5855-01-003-7102