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 6645-00-126-0286
NSN 6150-01-251-2544
NSN 5895-00-998-0045
NSN 7035-00-264-7543
NSN 5998-01-327-7755
NSN 5915-01-178-6802
NSN 6685-01-309-6240
NSN 6130-01-067-0786
NSN 5950-00-511-6609
NSN 6620-01-152-0936
NSN 5990-01-294-6198
NSN 5915-00-511-8241