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: Articles of plastics & articles of other materials of heading 3901 to 3914, nesoi
NSN 5985-01-330-9443
NSN 6620-01-176-3530
NSN 6650-01-287-7960
NSN 6610-00-905-6780
NSN 5996-01-455-2198
NSN 5998-01-171-7860
NSN 5905-01-367-6746
NSN 5950-01-397-1114
NSN 5915-00-869-1386
NSN 5910-01-322-0434
NSN 5945-01-328-7531
NSN 6110-01-464-2931