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ISO 337:1981

Road vehicles — 50 semi-trailer fifth wheel coupling pin — Basic and mounting/interchangeability dimensions ISO 337:1981

Publication date:   Dec 1, 1981

General information

90.93   Standard confirmed   Jun 23, 2026

ISO

ISO/TC 22/SC 40 Specific aspects for light and heavy commercial vehicles, busses and trailers

International Standard

43.040.70   Couplings

Buying

Published

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Scope

This second edition cancels and replaces the first edition (1973). Specifies the dimensions of the 50 coupling pin /dia. 50,8 mm (2 in)/ which is used for coupling semi-trailers to prime movers, taking into account the limitations of weight generally laid down by official requirements. Some figures illustrate shapes and the difference of types.

Life cycle

NOW

PUBLISHED
ISO 337:1981
90.93 Standard confirmed
Jun 23, 2026

CORRIGENDA / AMENDMENTS

PUBLISHED
ISO 337:1981/Cor 1:1990




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