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 2925-01-528-7333
NSN 2925-00-185-1618
NSN 6145-00-635-7998
NSN 5996-01-301-6113
NSN 6620-01-346-9340
NSN 5910-00-931-2795
NSN 5925-01-610-2594
NSN 5905-00-221-8797
NSN 7035-01-330-6768
NSN 4140-01-024-9414
NSN 5960-01-224-8022
NSN 5920-00-243-9506