EN ISO 8751:2007

Spring-type straight pins - Coiled, light duty (ISO 8751:2007)

ISO 8751:2007 specifies the characteristics of coiled, light 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 8 mm inclusive.

Spiralspannstifte - Leichte Ausführung (ISO 8751:2007)

Diese Internationale Norm beschreibt die Eigenschaften von Spiralspannstiften aus Stahl oder aus austenitischem oder martensitischem nichtrostenden Stahl, leichte Ausführung, mit Nenndurchmesser d1 von 1,5 mm bis einschließlich 8 mm.
ANMERKUNG   Spiralspannstifte in schwerer Ausführung und in Regelausführung werden in ISO 8748 und ISO 8750 beschrieben.

Goupilles élastiques spiralées - Série mince (ISO 8751:2007)

L'ISO 8751:2007 spécifie les caractéristiques des goupilles élastiques spiralées, série mince, en acier ou en acier inoxydable austénitique ou martensitique, de diamètre nominal compris entre 1,5 mm et 8 mm inclus.

Valjasto zviti vzmetni zatiči - Lahka izvedba (ISO 8751:2007)

General Information

• Status: Published
• Publication Date: 14-Apr-2007
• Withdrawal Date: 30-Oct-2007
• ICS: 21.060.50 - Pins, nails
• Technical Committee: CEN/TC 185 - Threaded and nonthreaded mechanical fasteners and accessories
• Drafting Committee: CEN/TC 185 - Threaded and nonthreaded mechanical fasteners and accessories
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 15-Apr-2007
• Completion Date: 15-Apr-2007
• Ref Project: SIST EN ISO 8751:2009 - Spring-type straight pins - Coiled, light duty (ISO 8751:2007)

Relations

• Replaces: EN ISO 8751:1997 - Spring-type straight pins - Coiled, light duty (ISO 8751:1997)
• Effective Date: 22-Dec-2008

Overview

EN ISO 8751:2007 is a European and international standard governing the specifications for coiled, light 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 8 mm inclusive. This third edition, published in 2007, supersedes the previous 1997 version and ensures consistent product quality, dimensions, and performance criteria across industries using these fasteners.

The standard is critical for manufacturers, engineers, and quality assurance professionals involved in the production and application of precision fasteners. It ensures reliability, interchangeability, and safety in mechanical assemblies where light duty spring pins are employed.

Key Topics

• Scope and Applicability: Specifies the characteristics related to dimensions, materials, mechanical properties, and workmanship of light duty coiled spring pins.
• Materials and Hardness: Includes requirements for steel, austenitic stainless steel, and martensitic stainless steel variants, with specified hardness values tested per ISO 6507-1.
• Dimensions and Tolerances: Defines nominal diameters from 1.5 mm to 8 mm with detailed tolerance grades based on ISO 286-2 for hole fits (tolerance class H12).
• Mechanical Properties: Minimum shear strength values are established differently for steel types, ensuring performance under load.
• Surface Finish and Coating: Pins are supplied plain or with protective lubricants. Recommendations regarding electroplating and phosphate coating consider hydrogen embrittlement risks, referencing ISO 4042 for surface treatment relief.
• Testing and Acceptance: Compliance is verified using standardized shear testing (ISO 8749) and acceptance inspection procedures (ISO 3269).
• Designation System: A clear method for pin identification includes pin type, diameter, length, and material code (e.g., Steel - St, Austenitic stainless steel - A).

Applications

Light duty coiled spring-type straight pins covered by EN ISO 8751:2007 are widely used in industries requiring reliable, precision fasteners for mechanical assemblies with moderate load requirements. Typical applications include:

• Automotive Components: Securing parts that require easy assembly and disassembly while maintaining alignment.
• Machinery and Equipment: Positioning and locking of shafts, gears, and levers with smooth operational tolerance fits.
• Electronics and Electrical Devices: Providing precise but slightly flexible fastening solutions in compact mechanical parts.
• Aerospace and Defense: Lightweight, corrosion-resistant pins for assemblies where durability and quality control are critical.
• General Manufacturing: Utilized wherever precision fasteners with standardized performance and dimensions are preferred for fastening and aligning components.

Related Standards

EN ISO 8751:2007 closely relates to the following standards, which cover other types and duties of spring pins and relevant fastener requirements:

• ISO 8748 – Spring-type straight pins - Coiled, heavy duty.
• ISO 8750 – Spring-type straight pins - Coiled, standard duty.
• ISO 286-2 – System of limits and fits, setting tolerance grades for mating parts.
• ISO 4042 – Requirements for electroplated coatings, particularly addressing hydrogen embrittlement relief.
• ISO 6507-1 – Vickers hardness testing method applicable to verifying material hardness.
• ISO 8749 – Shear test method for pins.
• ISO 3269 – Acceptance inspection for fasteners.

Practical Value

EN ISO 8751:2007 provides standardized technical specifications ensuring the reliable selection, application, and quality assurance of light duty coiled spring pins. This minimizes the risks of assembly failure, improves interchangeability among manufacturers, and supports international trade and compliance. By following this standard, companies can achieve uniform product performance, avoid costly non-conformities, and enhance product lifecycle in various engineering applications.

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Keywords: EN ISO 8751:2007, spring-type straight pins, coiled spring pins, light duty pins, steel pins, stainless steel pins, fastener standards, ISO 8751, fastener dimensions, shear strength, pin material specifications, ISO fasteners, mechanical assembly fasteners, tolerance class H12, hydrogen embrittlement, pin hardness, precision fastening.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Spiralspannstifte - Leichte Ausführung (ISO 8751:2007)Goupilles élastiques spiralées - Série mince (ISO 8751:2007)Spring-type straight pins - Coiled, light duty (ISO 8751:2007)21.060.50Pins, nailsICS:Ta slovenski standard je istoveten z:EN ISO 8751:2007SIST EN ISO 8751:2009en,fr,de01-maj-2009SIST EN ISO 8751:2009SLOVENSKI
STANDARDSIST EN ISO 8751:20011DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 8751April 2007ICS 21.060.50Supersedes EN ISO 8751:1997
English VersionSpring-type straight pins - Coiled, light duty (ISO 8751:2007)Goupilles élastiques spiralées - Série mince (ISO8751:2007)Spiralspannstifte - Leichte Ausführung (ISO 8751:2007)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 EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 8751:2007: ESIST EN ISO 8751:2009

Foreword
This document (EN ISO 8751:2007) 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 8751:1997.
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 8751:2007 has been approved by CEN as EN ISO 8751:2007 without any modifications.
Reference numberISO 8751:2007(E)© ISO 2007
INTERNATIONAL STANDARD ISO8751Third edition2007-04-15Spring-type straight pins — Coiled, light duty Goupilles élastiques spiralées — Série mince
ISO 8751:2007(E) 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.
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ISO 8751:2007(E) © ISO 2007 – All rights reserved iiiForeword 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
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