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 5905-00-691-6467
NSN 5915-01-084-1883
NSN 5915-00-472-9704
NSN 5915-01-535-0910
NSN 5985-00-212-7690
NSN 5855-00-763-2155
NSN 6240-00-170-5302
NSN 5990-00-389-0554
NSN 5895-01-591-8300
NSN 5996-01-099-2841
NSN 5996-01-409-1860
NSN 5935-01-571-7910