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 6220-01-394-1282
NSN 6620-00-103-3577
NSN 5925-01-090-9631
NSN 5895-01-580-9926
NSN 5935-01-433-4500
NSN 6320-01-422-1212
NSN 5965-01-435-6644
NSN 5985-01-193-8515
NSN 5905-01-029-0518
NSN 5998-00-974-6016
NSN 5990-01-318-3238
NSN 5960-01-614-8005