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 2925-01-398-6751
NSN 6645-01-586-5278
NSN 6145-01-211-6591
NSN 5999-01-286-8116
NSN 5935-01-529-8188
NSN 6320-01-449-1014
NSN 6135-01-449-0625
NSN 5985-00-905-0542
NSN 6685-01-316-8540
NSN 5985-01-054-6112
NSN 7035-00-631-3782
NSN 6620-00-109-9498