ISO/PRF 4580

Aerospace -- Drives, internal, TORX® PARALOBE® driver bit -- Geometrical definition, gaging and technical requirements

Aéronautique et espace -- Empreintes, TORX® PARALOBE®, embout d’entraînement -- Définition géométrique, calibrage et exigences techniques

General Information

• Status: Published
• ICS: 49.030.01 - Fasteners in general
• Technical Committee: ISO/TC 20/SC 4 - Aerospace fastener systems
• Drafting Committee: ISO/TC 20/SC 4/WG 3 - Supporting documents

Standards Content (sample)

INTERNATIONAL ISO
STANDARD 4580
First edition
Aerospace — Drive, internal, TORX®
PARALOBE®, driver bit — Geometrical
definition, gaging and technical
requirements
PROOF/ÉPREUVE
Reference number
ISO 4580:2021(E)
ISO 2021
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ISO 4580:2021(E)
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© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

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Published in Switzerland
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ISO 4580:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Basic driver bit configuration ................................................................................................................................................................. 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 Basic driver bit configuration dimensions — metric ............................................................................................. 2

4.3 Basic driver bit configuration dimensions — inch .................................................................................................. 3

4.4 Driver bit designation ....................................................................................................................................................................... 4

5 Driver bit inspection ......................................................................................................................................................................................... 4

5.1 Driver bit gaging equipment ....................................................................................................................................................... 4

5.2 Driver bit gaging procedure ......................................................................................................................................................... 5

5.3 Driver bit inspection gage dimensions — metric ..................................................................................................... 5

5.4 Driver bit inspection gage dimensions — inch ........................................................................................................... 6

6 Driver bit torque test ....................................................................................................................................................................................... 6

6.1 Driver bit torque test apparatus .............................................................................................................................................. 6

6.2 Torque test fixture ................................................................................................................................................................................ 7

6.3 Torque wrench/torsion machine ............................................................................................................................................ 8

7 Driver bit torque test procedure .......................................................................................................................................................... 8

© ISO 2021 – All rights reserved PROOF/ÉPREUVE iii
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ISO 4580:2021(E)
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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles,

Subcommittee SC 4, Aerospace fastener systems.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
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ISO 4580:2021(E)
Introduction

The International Organization for Standardization (ISO) draws attention to the fact that it is claimed

that compliance with this document may involve the use of a patent.

ISO takes no position concerning the evidence, validity and scope of this patent right.

The holder of this patent right has assured ISO that he/she is willing to negotiate licences under

reasonable and non-discriminatory terms and conditions with applicants throughout the world. In

this respect, the statement of the holder of this patent right is registered with ISO. Information may be

obtained from the patent database available at www .iso .org/ patents.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights other than those in the patent database. ISO shall not be held responsible for identifying

any or all such patent rights.
© ISO 2021 – All rights reserved PROOF/ÉPREUVE v
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INTERNATIONAL STANDARD ISO 4580:2021(E)
Aerospace — Drive, internal, TORX® PARALOBE®,
driver bit — Geometrical definition, gaging and technical
requirements
1 Scope

This document specifies basic dimensions, characteristics and engineering requirements for TORX

®1)
PARALOBE driver bits used with aerospace fasteners.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 4579, Aerospace — Drives, internal, TORX® PARALOBE® drive — Geometrical definition, gaging and

technical requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
driver bit
tool to induce a torque into a fastener’s recess (3.2)
3.2
recess

geometry in a fastener that allows attaching a tool in order to induce a torque to enable tightening and

untightening of a fastener
4 Basic driver bit configuration
4.1 General

The basic driver bit configuration shall be in accordance with Figure 1. Driver bits according to this

® ®

document shall be used in conjunction with fasteners having an internal TORX PARALOBE drive

according to ISO 4579.

1) TORX PARALOBE is the trademark of a product supplied by Acument Intellectual Properties, LLC, 6125 Eighteen

Mile Road, Sterling Heights, MI 48314, USA. This information is given for the convenience of users of this document

and does not constitute an endorsement by ISO of the products named. Equivalent products may be used if they can

be shown to lead to the same results.
© ISO 2021 – All rights reserved PROOF/ÉPREUVE 1
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ISO 4580:2021(E)
Key
⌀A configuration diameter (see Tables 1 and 2)
⌀B configuration inscribed diameter (see Tables 1 and 2)
L configuration length (see Tables 1 and 2)
1 driver bit marking
Figure 1 — Basic driver bit configuration

The drive size descriptor shall appear on surface of driver bit. The manufacturer’s symbol shall also

appear on the surface of driver bit.
EXAMPLE:
PARALOBE 25SI
4.2 Basic driver bit configuration dimensions — metric
Table 1 — Driver bit dimensions — metric
⌀A ⌀B L
Configuration Configuration Configuration Configuration
Drive size de-
diameter inscribed diam- length torque
Drive code
scriptor
eter
min. min.
mm mm mm N · m
001 1SI 0,89 0,64 0,38 0,175
002 2SI 1,02 0,71 0,46 0,256
003 3SI 1,21 0,84 0,53 0,424
004 4SI 1,37 0,99 0,61 0,662
005 5SI 1,50 1,10 0,64 0,891
006 6SI 1,80 1,38 0,76 1,65
007 7SI 2,10 1,59 0,91 2,51
008 8SI 2,44 1,85 1,07 4,01
009 9SI 2,64 2,01 1,12 5,11
010 10SI 2,90 2,18 1,22 6,69
015 15SI 3,45 2,64 1,47 11,6
020 20SI 4,08 3,15 1,70 19,5
025 25SI 4,69 3,56 1,96 28,9
027 27SI 5,27 4,08 2,18 42,4
030 30SI 5,84 4,51 2,44 57,6
040 40SI 7,02 5,41 2,95 99,9
045 45SI 8,27 6,48 3,48 167
050 50SI 9,35 7,21 3,99 237
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