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 5996-00-977-6080
NSN 5935-01-259-3835
NSN 6620-01-333-7014
NSN 6645-00-868-1246
NSN 5925-01-506-2807
NSN 6145-01-449-2513
NSN 5985-00-427-5216
NSN 5950-01-029-3033
NSN 5925-01-360-8673
NSN 5998-01-198-4914
NSN 2925-01-303-5266
NSN 5925-00-924-6296