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 5925-00-397-8258
NSN 5945-01-644-7373
NSN 5965-00-940-8699
NSN 6320-01-451-0821
NSN 6220-01-053-5917
NSN 5915-01-519-2234
NSN 5930-01-370-5868
NSN 6320-00-369-1333
NSN 5985-01-651-9584
NSN 6650-01-060-3628
NSN 6135-01-423-7502
NSN 6645-01-231-9891