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 6320-01-225-9963
NSN 5945-01-350-3582
NSN 6320-01-243-2276
NSN 6320-01-230-8444
NSN 6105-01-621-2527
NSN 5920-00-529-0618
NSN 5835-00-401-2578
NSN 5975-00-435-0350
NSN 7035-01-033-3007
NSN 2925-00-631-1709
NSN 6610-00-115-3519
NSN 6150-01-357-9529