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 5965-01-023-7095
NSN 4140-01-224-6994
NSN 5945-01-090-0890
NSN 5915-01-435-5275
NSN 6145-01-399-1158
NSN 5999-00-932-1316
NSN 6685-01-451-7001
NSN 6110-01-068-9241
NSN 6320-01-290-5271
NSN 6240-00-334-6766
NSN 5945-00-243-2040
NSN 6150-00-218-0891