ISO/R 225:1961

UDC 621.882.1/.6
Ref. No.: ISO/R 225 - 1961 (E)
IS0
INTERN AT1 O NA L ORGANIZATION FOR STAN DA RD I ZATlO N
IS0 RECOMMENDATION
R 225
BOLTS, SCREWS AND STUDS
DlMENSlONlNG
1st EDITION
December 1961
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 EO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian.
Copies to be obtained through the national standards organizations.

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BRIEF HISTORY
The IS0 Recommendation R 225, Bolts, Screws and Studs. Dimensioning, was drawn
up by Technical Committee ISO/TC 2, Bolts, Nuts and Accessories, the Secretariat of which is
held by the Deutscher Normenausschuss (DNA).
Work on this question by the Technical Committee began in 1949 and led in 1958 to the
adoption of a Draft IS0 Recommendation.
In January 1960, this Draft IS0 Recommendation (No. 354) was circulated to all the
IS0 Member Bodies for enquiry. It was approved, subject to some editorial amendments,
by the following Member Bodies:
Australia Germany Poland
Austria Greece Portugal
Belgium Hungary Romania
Burma India Spain
Chile Ireland Sweden
Colombia Italy Switzerland
Czechoslovakia Japan United Kingdom
Denmark Netherlands U.S.A.
New Zealand
Finland U.S.S.R.
France Norway
One Member Body opposed the approval of the Draft:
Israel.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0
Council, which decided, in December 1961, to accept it as an IS0 RECOMMENDATION.
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ISO/R 225 - 1961 (E)
~ ~~
IS0 Recommendation
Decem ber 1961
BOLTS, SCREWS AND STUDS
DIMENSIONING
I. Bolts and screws in tension or in shear
-qFq
I
II. Screws in compression
'--
II -+-+
I-
-
III. Studs
1. Length 1
In the case of
the length I extends
~ ~~
bolts and screws having plain bearing
from the extreme end
surfaces
to the undersid
...