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 5945-00-185-6609
NSN 6620-01-440-9810
NSN 5930-00-078-8302
NSN 6105-01-212-9245
NSN 5920-00-359-9771
NSN 5945-01-472-2099
NSN 6610-01-147-3099
NSN 6145-00-524-9130
NSN 6240-01-463-8276
NSN 5920-01-578-7055
NSN 5975-01-600-9457
NSN 5996-01-358-4859