ISO 4086:1982

Road vehicles — 90 semi-trailer fifth wheel coupling pin — Basic and mounting/interchangeability dimensions

Specifies the dimensions of the 90 coupling pin /dia. 89 mm (3,5 in)/ which is used for coupling extra-heavy-duty vehicles exceeding the limitations of weight generally laid down by official requirements. Some figures illustrate shapes and the difference of types. This second edition cancels and replaces the first edition (1977).