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UDC 621.aa2.1/.6
IS0
I N T ERN AT1 O NA L ORGAN IZATl O N
FOR STAN D AR D IZ AT1 ON
IS0 RECOMMENDATION
R 273
CLEARANCE HOLES FOR METRIC BOLTS
Ist EDITION
September 1962
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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IS0 / R 273 - 1962 (E)
IS0 Recommendation R 273 September 1962
CLEARANCE HOLES FOR METRIC BOLTS
Dimensions in millimetres
Clearance holes D
Thread
diameter
Series
d fine 1 medium I coarse
1.6 I 1.7 1 1.8 1 2
2
...