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 5998-01-081-2641
NSN 6240-01-547-2026
NSN 5965-01-298-6313
NSN 7035-01-194-9482
NSN 7035-01-472-4207
NSN 6320-01-029-4220
NSN 5998-00-225-8522
NSN 6130-01-197-5817
NSN 6610-01-419-0929
NSN 5999-01-576-0325
NSN 6620-01-580-0883
NSN 5895-00-280-0416