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 6645-01-158-3592
NSN 6645-01-611-5068
NSN 5895-01-385-8782
NSN 6320-01-451-0821
NSN 6685-01-207-3358
NSN 5935-01-043-5317
NSN 7035-01-016-4587
NSN 6145-01-385-0767
NSN 5990-01-054-4255
NSN 5905-00-498-8400
NSN 5915-01-090-0478
NSN 5910-01-500-1073