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 5925-00-262-6087
NSN 6685-01-492-6024
NSN 6105-01-426-3882
NSN 6610-00-500-6944
NSN 5930-00-259-7150
NSN 6610-01-147-3099
NSN 6135-00-262-6807
NSN 5935-00-795-5824
NSN 2925-01-643-2967
NSN 5999-00-081-9168
NSN 5960-01-487-6436
NSN 6645-00-100-7218