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 5905-01-058-1485
NSN 5960-01-046-4482
NSN 6650-01-463-8405
NSN 5999-00-835-2249
NSN 6320-01-015-9856
NSN 5895-01-170-4874
NSN 2925-00-542-8285
NSN 5975-01-168-7643
NSN 5960-01-369-3628
NSN 6685-01-417-8168
NSN 5835-01-050-9509
NSN 5930-01-578-7868