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INTERN AT10 N A L O RG AN IZATl O N
FOR STAN DARD IZATl ON
IS0 RECOMMENDATION
R 888
NOMINAL LENGTHS FOR BOLTS, SCREWS AND STUDS
THREAD LENGTHS FOR GENERAL PURPOSE BOLTS
1st EDITION
December 1968
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 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 888, Nominal lengths for bolts, screws and studs - Thread
lengths for general purpose bolts, 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 1959 and led, in 1965, to the
adoption of a Draft IS0 Recommendation for nominal lengths up to and including 200 mm.
This first Draft IS0 Recommendation (No. 950) was circulated in May 1966 to all the
Member Bodies for enquiry and was approved by a majority of IS0 Member Bodies. However, at a
meeting held in October 1966, the Technical Committee recommended the establishment of a second
Draft IS0 Recommendation, in which nominal lengths above 200 mm up to and including 300 mm
should be added.
In August 1967, this second Draft IS0 Recommendation was circulated to all the IS0 Member
Bodies for enquiry. It was approved, subject to a few modifications of an editorial nature, by the
following Member Bodies :
Austria Iran Romania
South Africa, Rep. of
Belgium Ireland
Canada Israel Spain
Sweden
Chile Italy
Czechoslovakia Switzerland
Japan
Denmark Korea, Rep. of Thailand
Finland Netherlands Turkey
Germany New Zealand U.A.R.
Greece Norway United Kingdom
Hungary Poland U.S .S .R.
India Portugal Yugoslavia
Two Member Bodies opposed the approval of the second Draft :
France
U.S.A.
The second Draft IS0 Recommendation was then submitted by correspondence to the IS0
an IS0 RECOMMENDATION.
Council, which decided, in December 1968, to accept it as
-3-
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ISO/R 888-1968 (E)
IS0 Recommendation R 888 D ece m be r 1 968
NOMINAL LENGTHS FOR BOLTS, SCREWS AND STUDS
FOR GENERAL PURPOSE BOLTS
...