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Ref. No.: IÇO/R 337 - 1963 (E)
IS0
I NT ERN AT1 ON AL
O RG A N 12 AT1 O N FOR
STAND AR D IZATl O N
I S O R E C O M M E N D AT1 O N
R 337
SEM I -TRAI LER FI FTH WH EEL KI N G PI N
1st EDITION
September 1963
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the oniy valid standard is the national standard of that country.
Printed in SwitzerIand
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recomnienda tion R 337, Semi-Trailer F$th Wheel Kingpin, was drawn up by
Technical Committee ISO/TC 22, Automobiles, the Secretariat of which is held by the
Association Française de Normalisation (AFNOR).
Work on this question by the Technical Committee began in 1958 and led, in 1960,
to the adoption of a Draft IS0 Recommendation.
In April 1961, this Draft IS0 Recommendation (No. 444) was circulated to all the
IS0 Member Bodies for enquiry. It was approved by the following Member Bodies:
Australia Hungary Romania
Austria Iran Sweden
Chile Italy Switzerland
Colombia Japan United Kingdom
Czechoslovakia Netherlands U.S
...