Road vehicles - 90 semi-trailer fifth wheel kingpin - Interchangeability

This International Standard specifies the characteristics of the 90 [89 mm (3,5") diameter] semi-trailer fifth wheel kingpin used for coupling extra-heavy-duty vehicles exceeding the limitations of weight generally laid down by official requirements. It is applicable to fifth wheel kingpins intended for engaging 90 fifth wheels as defined in ISO 3842 [1]. This International Standard also specifies the dimensional characteristics required for mounting and interchangeability. NOTE The dimensions of the 50 semi-trailer fifth wheel kingpin, normally used to couple semi-trailers to tractors in compliance with mass limitations usually set by compulsory regulations, are given in ISO 337[2].

Véhicules routiers — Pivot d'attelage de 90 pour semi-remorque — Interchangeabilité

La présente Norme internationale spécifie les caractéristiques des pivots d'attelage de 90 pour semi-remorques [∅ 89 mm (3,5 in)] utilisés pour les ensembles articulés dont la masse dépasse les limites généralement fixées par les exigences réglementaires. Elle s'applique aux pivots destinés à être engagés dans les sellettes définies dans l'ISO 3842 [1]. De plus, elle spécifie les caractéristiques dimensionnelles nécessaires au montage et à l'interchangeabilité. NOTE Les dimensions des pivots d'attelage de 50 mm, normalement utilisés pour accoupler les semi-remorques aux tracteurs conformément aux limitations de masse contenues dans les réglementations, sont indiquées dans l'ISO 337[2].

General Information

Status
Published
Publication Date
31-Oct-2001
Current Stage
9093 - International Standard confirmed
Start Date
24-Feb-2021
Completion Date
13-Dec-2025

Relations

Effective Date
15-Apr-2008

Overview

ISO 4086:2001 - "Road vehicles - 90 semi-trailer fifth wheel kingpin - Interchangeability" defines the dimensional and mounting characteristics of the 90 (Ø89 mm / 3.5") semi-trailer fifth wheel kingpin used on extra‑heavy‑duty articulated combinations that exceed normal regulatory mass limits. The standard ensures mechanical compatibility between kingpins and the matching fifth wheels defined in ISO 3842, and it specifies the interchangeability requirements and testing references needed for safe coupling.

Key Topics and Requirements

  • Kingpin size and scope: Specifies the 90 (Ø89 mm) semi‑trailer kingpin intended for heavy-duty applications beyond common statutory mass limits.
  • Functional dimensions: Requires compliance with the functional geometry shown in the standard’s figures (functional layout for engaging ISO 3842 fifth wheels).
  • Mounting and interchangeability dimensions: Defines dimensional characteristics for mounting on trailer chassis; includes detail views for different mount types (Type A and Type B) and identifies critical control and verification dimensions.
  • Fastening provisions: Illustrates mounting hole patterns and sizes used for installation (figures reference 8 holes Ø21 mm for M20 bolts).
  • Testing requirement: Calls for strength and durability testing according to ISO 8716 (fifth wheel kingpin resistance test).
  • Design intent: Focus on interchangeability to allow safe replacement, manufacture and cross‑compatibility of kingpins and fifth wheels across different suppliers and fleets.

Applications and Who Uses ISO 4086:2001

Practical applications include:

  • Ensuring compatibility between semi‑trailers and tractors for heavy haul, specialized transport and extra‑heavy loads.
  • Guiding trailer chassis designers and OEMs on mounting interfaces and factory fitment.
  • Informing aftermarket parts manufacturers and maintenance workshops on permitted replacement kingpin dimensions and mounting checks.
  • Supporting vehicle certification bodies and fleet safety managers in assessing coupling components for interchangeability and compliance.

Primary users:

  • Semi‑trailer and coupling component manufacturers
  • Chassis engineers and OEMs
  • Test laboratories and certification agencies
  • Fleet operators, maintenance providers, and parts suppliers

Related Standards

  • ISO 3842 - Sellette d'attelage / fifth wheel interchangeability (defines matching fifth wheel geometry).
  • ISO 337 - 50 mm semi‑trailer kingpin dimensions (for standard mass‑limited applications).
  • ISO 8716 - Test methods for kingpin strength and resistance (referenced by ISO 4086 for testing requirements).

Keywords: ISO 4086:2001, 90 semi-trailer fifth wheel kingpin, kingpin interchangeability, mounting dimensions, ISO 3842, ISO 8716, ISO 337, heavy-duty trailers.

Standard

ISO 4086:2001 - Road vehicles -- 90 semi-trailer fifth wheel kingpin -- Interchangeability

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Standard

ISO 4086:2001 - Véhicules routiers -- Pivot d'attelage de 90 pour semi-remorque -- Interchangeabilité

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Frequently Asked Questions

ISO 4086:2001 is a standard published by the International Organization for Standardization (ISO). Its full title is "Road vehicles - 90 semi-trailer fifth wheel kingpin - Interchangeability". This standard covers: This International Standard specifies the characteristics of the 90 [89 mm (3,5") diameter] semi-trailer fifth wheel kingpin used for coupling extra-heavy-duty vehicles exceeding the limitations of weight generally laid down by official requirements. It is applicable to fifth wheel kingpins intended for engaging 90 fifth wheels as defined in ISO 3842 [1]. This International Standard also specifies the dimensional characteristics required for mounting and interchangeability. NOTE The dimensions of the 50 semi-trailer fifth wheel kingpin, normally used to couple semi-trailers to tractors in compliance with mass limitations usually set by compulsory regulations, are given in ISO 337[2].

This International Standard specifies the characteristics of the 90 [89 mm (3,5") diameter] semi-trailer fifth wheel kingpin used for coupling extra-heavy-duty vehicles exceeding the limitations of weight generally laid down by official requirements. It is applicable to fifth wheel kingpins intended for engaging 90 fifth wheels as defined in ISO 3842 [1]. This International Standard also specifies the dimensional characteristics required for mounting and interchangeability. NOTE The dimensions of the 50 semi-trailer fifth wheel kingpin, normally used to couple semi-trailers to tractors in compliance with mass limitations usually set by compulsory regulations, are given in ISO 337[2].

ISO 4086:2001 is classified under the following ICS (International Classification for Standards) categories: 43.040.70 - Couplings. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 4086:2001 has the following relationships with other standards: It is inter standard links to ISO 4086:1982. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase ISO 4086:2001 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.

Standards Content (Sample)


INTERNATIONAL ISO
STANDARD 4086
Third edition
2001-10-15
Road vehicles — 90 semi-trailer fifth wheel
kingpin — Interchangeability
Véhicules routiers — Pivot d'attelage de 90 pour semi-remorque —
Interchangeabilité
Reference number
©
ISO 2001
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Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted
by the technical committees are circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 4086 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 15,
Interchangeability of components of commercial vehicles and buses.
This third edition cancels and replaces the second edition (ISO 4086:1982), which has been technically revised.

INTERNATIONAL STANDARD ISO 4086:2001(E)

Road vehicles — 90 semi-trailer fifth wheel kingpin —
I
...


NORME ISO
INTERNATIONALE 4086
Troisième édition
2001-10-15
Véhicules routiers — Pivot d'attelage de 90
pour semi-remorque — Interchangeabilité
Road vehicles — 90 semi-trailer fifth wheel kingpin — Interchangeability

Numéro de référence
©
ISO 2001
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©  ISO 2001
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque
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Fax. + 41 22 749 09 47
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Web www.iso.ch
Imprimé en Suisse
ii © ISO 2001 – Tous droits réservés

Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux de
normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général confiée aux
comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire partie du comité
technique créé à cet effet. Les organisations internationales, gouvernementales et non gouvernementales, en
liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec la Commission
électrotechnique internationale (CEI) en ce qui concerne la normalisation électrotechnique.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives ISO/CEI, Partie 3.
La tâche principale des comités techniques est d'élaborer les Normes internationales. Les projets de Normes
internationales adoptés par les comités techniques sont soumis aux comités membres pour vote. Leur publication
comme Normes internationales requiert l'approbation de 75 % au moins des comités membres votants.
L'attention est appelée sur le fait que certains des éléments de la présente Norme internationale peuvent faire
l'objet de droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable de
ne pas avoir identifié de tels droits de propriété et averti de leur existence.
L'ISO 4086 a été élaborée par le comité technique ISO/TC 22, Véhicules routiers, sous-comité SC 15,
Interchangeabilité des composants des véhicules utilitaires et autobus.
Cette troisième édition annule et remplace la deuxième édition (ISO 4086:1982), qui a fait l'objet d'une révision
technique.
NORME INTERNATIONALE ISO 4086:2001(F)

Véhicules routi
...

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