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 6620-00-464-6105
NSN 6110-01-591-5195
NSN 6150-00-962-2183
NSN 6145-00-767-8124
NSN 6320-00-925-0558
NSN 5925-01-547-0661
NSN 5945-01-578-1188
NSN 2925-01-348-8306
NSN 5990-01-362-5373
NSN 5990-00-513-5328
NSN 5965-00-465-9566
NSN 5910-00-867-1380