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 6135-01-334-3935
NSN 5996-01-067-2807
NSN 6620-00-317-7820
NSN 5998-01-286-2124
NSN 5996-00-703-5367
NSN 5910-01-359-1966
NSN 6645-00-539-1705
NSN 6130-00-596-7111
NSN 6620-01-189-8153
NSN 5910-01-420-7423
NSN 5985-01-605-9404
NSN 5930-01-583-3071