This International Standard specifies the main characteristics of connections used for checking response times and presssure levels for braking equipment fitted on road vehicles with the exception of passenger cars and their derivatives. To ensure absolute freedom from leakage, thereby perfecting the functioning of the brake system, the pressure test connection shall be so installed that it is possible to remove the sealing cap, connect the test apparatus and carry out the test required without subjecting the test point to additional torsion or bending stresses.