Spring-type straight pins - Coiled, heavy duty (ISO 8748:2007)

ISO 8748:2007 specifies the characteristics of coiled, heavy duty spring-type straight pins made of steel or of austenitic or martensitic stainless steel, with a nominal diameter of from 1,5 mm to 20 mm inclusive.

Spiralspannstifte - Schwere Ausführung (ISO 8748:2007)

Diese Internationale Norm beschreibt die Eigenschaften von Spiralspannstiften aus Stahl oder aus austenitischem oder martensitischem nichtrostenden Stahl, schwere Ausführung, mit Nenndurchmesser d1 von 1,5 mm bis einschließlich 20 mm.
ANMERKUNG   Spiralspannstifte in Regelausführung und in leichter Ausführung werden in ISO 8750 und ISO 8751 beschrieben.

Goupilles élastiques spiralées - Série épaisse (ISO 8748:2007)

L'ISO 8748:2007 spécifie les caractéristiques des goupilles élastiques spiralées, série épaisse, en acier ou en acier inoxydable austénitique ou martensitique, de diamètre nominal compris entre 1,5 mm et 20 mm inclus.

Valjasto zviti vzmetni zatiči - Težka izvedba (ISO 8748:2007)

General Information

Status
Published
Publication Date
14-Apr-2007
Withdrawal Date
30-Oct-2007
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
15-Apr-2007
Completion Date
15-Apr-2007

Relations

Effective Date
22-Dec-2008

Overview

EN ISO 8748:2007 is a European adoption of the international standard ISO 8748:2007, specifying the requirements for coiled, heavy duty spring-type straight pins. These pins are manufactured from steel or stainless steel (austenitic or martensitic) and have nominal diameters ranging from 1.5 mm to 20 mm. This standard ensures that these fasteners meet strict quality, dimensional, and mechanical property criteria essential for reliable industrial applications. It supersedes the earlier 1997 edition, reflecting updated material and testing requirements.

Key Topics

  • Scope and Dimensions
    The standard defines precise dimensional tolerances for pin diameters and lengths, ensuring interchangeability and fitting accuracy. Dimensions include nominal diameters from 1.5 mm up to 20 mm, with detailed limits provided for pre- and post-mounting diameters, swaged chamfer ends, and lengths available in commercial increments. The recommended hole diameter for installation must match the pin’s nominal diameter with an H12 tolerance class in accordance with ISO 286-2.

  • Materials and Mechanical Properties
    Pins covered by EN ISO 8748:2007 are constructed from carbon steel and stainless steels, including austenitic and martensitic grades. Chemical composition limits and hardness ranges are specified to guarantee mechanical performance:

    • Steel pins are hardened and tempered to a Vickers hardness range of 420 HV to 545 HV.
    • Martensitic stainless steel pins have a hardness range of 460 HV to 560 HV.
    • Austenitic stainless pins are cold worked as per agreed specifications.
      Mechanical testing such as shear strength must comply with ISO 8749.
  • Surface Treatment and Quality
    The standard advises plain finish pins treated with protective lubricants unless coatings are specified. Due to the risk of hydrogen embrittlement, electroplating and phosphate coatings require careful process control, including mandatory baking after plating as per ISO 4042 guidelines. Workmanship requirements prevent burrs and defects on the pins to maintain performance and safety.

  • Testing and Acceptance
    Acceptance inspection according to ISO 3269 ensures compliance with dimensional and mechanical standards. Shear testing per ISO 8749 evaluates pin strength, validating suitability for heavy-duty fastening applications.

  • Designation System
    The standard provides a clear nomenclature for identifying pins by type, diameter, length, and material. For example:

    • Steel pin with 6 mm diameter and 30 mm length: Spring pin ISO 8748 - 6 × 30 - St
    • Austenitic stainless steel pin with the same size: Spring pin ISO 8748 - 6 × 30 - A

Applications

Coiled heavy duty spring-type straight pins specified by EN ISO 8748:2007 are widely used in mechanical assemblies requiring secure, resilient fastening under load and vibration conditions. Typical applications include:

  • Automotive and aerospace components
  • Machinery and equipment assembly
  • Heavy-duty industrial and structural connections
  • Precise alignment and shear load distribution in shafts and housings
  • Equipment requiring corrosion resistance when using stainless steel variants

These pins provide durable, fatigue-resistant fastening solutions essential in demanding environments.

Related Standards

  • ISO 8750: Spring-type straight pins - Coiled, standard duty
  • ISO 8751: Spring-type straight pins - Coiled, light duty
  • ISO 286-2: System of limits and fits - Tolerance grades and limit deviations for holes and shafts
  • ISO 8749: Pins and grooved pins - Shear test
  • ISO 3269: Fasteners - Acceptance inspection
  • ISO 4042: Fasteners - Electroplated coatings
  • ISO 6507-1: Metallic materials - Vickers hardness test - Test method

Understanding these related documents complements proper specification, testing, and application of spring-type straight pins, ensuring compliance and performance in engineering designs.


Keywords: EN ISO 8748:2007, spring-type straight pins, coiled heavy duty pins, steel pins, stainless steel pins, pin dimensions, shear strength, fasteners standard, ISO 8748, heavy duty spring pins, pin hardness, industrial fasteners, ISO fastener standards, hydrogen embrittlement prevention, pin designation.

Frequently Asked Questions

EN ISO 8748:2007 is a standard published by the European Committee for Standardization (CEN). Its full title is "Spring-type straight pins - Coiled, heavy duty (ISO 8748:2007)". This standard covers: ISO 8748:2007 specifies the characteristics of coiled, heavy duty spring-type straight pins made of steel or of austenitic or martensitic stainless steel, with a nominal diameter of from 1,5 mm to 20 mm inclusive.

ISO 8748:2007 specifies the characteristics of coiled, heavy duty spring-type straight pins made of steel or of austenitic or martensitic stainless steel, with a nominal diameter of from 1,5 mm to 20 mm inclusive.

EN ISO 8748:2007 is classified under the following ICS (International Classification for Standards) categories: 21.060.50 - Pins, nails. The ICS classification helps identify the subject area and facilitates finding related standards.

EN ISO 8748:2007 has the following relationships with other standards: It is inter standard links to EN ISO 8748:1997. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase EN ISO 8748:2007 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.

Standards Content (Sample)


SLOVENSKI STANDARD
01-maj-2009
1DGRPHãþD
SIST EN ISO 8748:2001
9DOMDVWR]YLWLY]PHWQL]DWLþL7HåNDL]YHGED ,62
Spring-type straight pins - Coiled, heavy duty (ISO 8748:2007)
Spiralspannstifte - Schwere Ausführung (ISO 8748:2007)
Goupilles élastiques spiralées - Série épaisse (ISO 8748:2007)
Ta slovenski standard je istoveten z: EN ISO 8748:2007
ICS:
21.060.50 =DWLþLåHEOML Pins, nails
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 8748
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2007
ICS 21.060.50 Supersedes EN ISO 8748:1997
English Version
Spring-type straight pins - Coiled, heavy duty (ISO 8748:2007)
Goupilles élastiques spiralées - Série épaisse (ISO Spiralspannstifte - Schwere Ausführung (ISO 8748:2007)
8748:2007)
This European Standard was approved by CEN on 22 March 2007.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8748:2007: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 8748:2007) has been prepared by Technical Committee ISO/TC 2
"Fasteners" in collaboration with Technical Committee CEN/TC 185 "Fasteners”, the secretariat
of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by October 2007, and conflicting national
standards shall be withdrawn at the latest by October 2007.

This document supersedes EN ISO 8748:1997.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United
Kingdom.
Endorsement notice
The text of ISO 8748:2007 has been approved by CEN as EN ISO 8748:2007 without any
modifications.
INTERNATIONAL ISO
STANDARD 8748
Third edition
2007-04-15
Spring-type straight pins — Coiled, heavy
duty
Goupilles élastiques spiralées — Série épaisse

Reference number
ISO 8748:2007(E)
©
ISO 2007
ISO 8748:2007(E)
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ii © ISO 2007 – All rights reserved

ISO 8748:2007(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.
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 8748 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 10, Product
standards for fasteners.
This third edition cancels and replaces the second edition (ISO 8748:1997), which has been technically
re
...

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