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This International Standard specifies dimensional and physical requirements of tow bar connections to tractor and aircraft (see Figure 1). It is applicable to any new type of commercial-transport-category aircraft tow bar designed or built after publication of this International Standard.The purpose of this International Standard is to standardize tow bar attachments to airplane and tractor according to the mass category of the towed aircraft, so that one tow bar head with different shear levels can be used for all aircraft that are within the same mass category and are manufactured in compliance with ISO 8267 (all parts).