ISO 337:1981 Preview
Road vehicles -- 50 semi-trailer fifth wheel coupling pin -- Basic and mounting/interchangeability dimensions
This standard was last reviewed and confirmed in 2015. Therefore this version remains current.
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.
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Revisions / Corrigenda
ISO 337:1981/Cor 1:1990