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 5945-00-395-2572
NSN 5965-01-258-8735
NSN 6130-00-165-6690
NSN 6150-01-153-0521
NSN 5915-01-604-9404
NSN 6220-01-578-7084
NSN 6645-01-394-5149
NSN 6220-00-420-6306
NSN 2925-01-359-9818
NSN 6320-01-242-8355
NSN 6145-00-162-7922
NSN 6130-01-351-5436