This standard specifies the requirements for connecting the No. 90 (diameter: 89mm) traction pin of semi-trailer fifth wheel to super-heavy vehicles. This standard applies to No. 90 traction pins that comply with the provisions of GB/T 13880. This standard also specifies the characteristic requirements for installation and interchangeability dimensions.
GB/T 4607-2006 Referenced Document
ISO 8716 Road vehicles - Fifth wheel kingpins - Strength test