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 6130-01-005-2205
NSN 5895-00-367-9619
NSN 5985-01-516-8510
NSN 5895-00-284-4835
NSN 6320-01-166-3602
NSN 5975-00-269-4365
NSN 5998-00-630-9384
NSN 6320-01-315-4517
NSN 6110-00-926-0781
NSN 6145-01-224-5819
NSN 5950-00-949-4676
NSN 5950-00-900-3877