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 5965-01-399-8454
NSN 6650-01-523-2302
NSN 6650-01-521-0902
NSN 6135-01-127-0173
NSN 6105-00-248-5772
NSN 5905-00-550-0937
NSN 5985-00-957-3660
NSN 6320-01-643-0850
NSN 6220-01-135-3841
NSN 4140-00-660-8699
NSN 6320-01-445-8192
NSN 5935-01-354-0165