ISO 5856:2008

INTERNATIONAL ISO
STANDARD 5856
Second edition
2008-08-15
Aerospace — Screws, 100 degrees
normal countersunk head, internal offset
cruciform ribbed or unribbed drive,
normal shank, short or medium length MJ
threads, metallic material, coated or
uncoated, strength classes less than or
equal to 1 100 MPa — Dimensions
Aéronautique et espace — Vis à tête fraisée 100 degrés normale, à
empreinte cruciforme déportée, avec ou sans saillies antidérapantes,
avec tige normale et filetages MJ courts ou de longueur moyenne, en
matériau métallique, revêtues ou non revêtues, de classes de
résistance inférieures ou égales à 1 100 MPa — Dimensions

Reference number
©
ISO 2008
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO 2008
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2008 – All rights reserved

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 5856 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 4,
Aerospace fastener systems.
This second edition cancels and replaces the first edition (ISO 5856:1991), which has been technically revised.

INTERNATIONAL STANDARD ISO 5856:2008(E)

Aerospace — Screws, 100 degrees normal countersunk head,
internal offset cruciform ribbed or unribbed drive, normal shank,
short or medium length MJ threads, metallic material, coated or
uncoated, strength classes less than or equal to 1 100 MPa —
Dimensions
1 Scope
This International Standard specifies the dimensions of 100° normal countersunk head screws with internal
offset cruciform ribbed or unribbed drive, with close or large tolera
...