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 2925-00-461-4954
NSN 5999-00-033-9607
NSN 6220-01-376-3570
NSN 5965-01-063-7894
NSN 5935-01-475-8833
NSN 6320-01-487-0336
NSN 5950-01-103-1697
NSN 6130-01-556-0528
NSN 5935-00-557-4482
NSN 5930-01-053-5088
NSN 2925-00-464-7892
NSN 6320-01-585-8468