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 7035-00-188-6674
NSN 5945-00-619-3553
NSN 7035-01-182-1086
NSN 6240-01-193-6545
NSN 6320-00-115-0883
NSN 6220-01-414-8926
NSN 6620-01-513-8525
NSN 2925-01-440-6146
NSN 6145-00-259-1622
NSN 5855-01-346-2881
NSN 5999-01-288-5657
NSN 5905-01-377-5034