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 6220-00-479-4802
NSN 6645-00-064-9839
NSN 5930-01-412-4256
NSN 5915-01-352-5871
NSN 2925-00-351-1015
NSN 5965-01-452-8406
NSN 6240-01-480-8996
NSN 6650-01-058-5908
NSN 5925-00-490-0275
NSN 6320-00-115-0883
NSN 5965-01-196-7760
NSN 6135-01-561-5945