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 5960-00-751-1547
NSN 6105-01-315-3724
NSN 5945-01-152-2780
NSN 6320-00-886-9771
NSN 2925-01-190-3121
NSN 6320-01-114-6054
NSN 6145-01-401-3713
NSN 6645-01-529-5690
NSN 5996-01-264-7731
NSN 6620-01-391-9829
NSN 6130-00-017-9339
NSN 5996-01-042-0484