Den påførte kraft skal gå gennem midten af den cylindriske del af den mindste diameter af hovedbolten, hvis diameter er 50,8 mm for klasse H50 (se bilag 5, figur 18).
The line of action of the force shall pass through the centre of the smallest diameter of the cylindrical part of the coupling pin having a diameter of 50,8 mm for Class H50 (see annex 5, Figure 18).