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 7035-00-478-4596
NSN 5990-01-263-0362
NSN 5915-01-218-6100
NSN 5910-01-213-1328
NSN 6620-01-025-4690
NSN 5950-00-811-3587
NSN 7035-00-870-0290
NSN 5930-01-407-2121
NSN 5998-00-684-8186
NSN 5990-00-880-1299
NSN 5920-01-521-6928
NSN 6685-01-508-6237