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 5965-01-068-2714
NSN 5925-00-396-2412
NSN 5855-00-610-4052
NSN 5965-01-421-1244
NSN 5960-01-237-8995
NSN 5985-01-311-5239
NSN 5915-00-717-5409
NSN 5975-01-305-5749
NSN 6650-01-068-3997
NSN 6150-00-735-1276
NSN 6610-00-846-4525
NSN 5935-01-418-7625