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 5855-00-757-5149
NSN 5855-00-494-9581
NSN 6110-00-486-0514
NSN 5975-00-976-5780
NSN 5998-00-083-6480
NSN 5935-00-678-2390
NSN 6220-01-660-9774
NSN 6105-01-067-4739
NSN 5975-01-606-8308
NSN 6130-01-608-6775
NSN 6610-01-317-4859
NSN 5905-01-109-8295