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 5920-01-114-9811
NSN 5965-01-643-2851
NSN 5920-01-318-6054
NSN 6650-01-600-1080
NSN 5960-01-553-4557
NSN 6320-00-110-8005
NSN 5910-01-514-0041
NSN 5925-00-226-0265
NSN 6645-01-097-5831
NSN 5990-00-812-7608
NSN 5945-00-370-9477
NSN 5950-01-258-6216