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 2925-01-581-7478
NSN 2925-01-458-5808
NSN 5996-00-036-7928
NSN 6150-00-288-4737
NSN 5835-01-254-8584
NSN 2925-00-388-8932
NSN 5905-00-587-1233
NSN 6620-01-367-4960
NSN 5915-00-946-7769
NSN 6650-01-581-2390
NSN 5998-01-441-3197
NSN 5985-00-035-4558