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 5960-01-471-2656
NSN 5905-01-338-7269
NSN 5910-00-891-4245
NSN 5910-00-779-5237
NSN 6130-01-540-6506
NSN 5925-01-388-2763
NSN 5975-01-094-3287
NSN 5960-00-226-3319
NSN 6320-00-908-6841
NSN 5855-00-494-9581
NSN 5999-00-113-2652
NSN 5975-01-455-4853