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 5998-01-422-9779
NSN 6150-01-660-5313
NSN 6220-01-208-3390
NSN 5905-00-897-5654
NSN 5965-00-051-6434
NSN 6135-00-801-3493
NSN 6320-00-553-8427
NSN 6220-00-583-9889
NSN 5855-01-147-6024
NSN 6145-01-224-6000
NSN 5925-00-286-8502
NSN 5920-00-349-8837