SIST EN ISO 8743:2001

Grooved pins - Half-length centre grooved (ISO 8743:1997)

Knebelkerbstifte mit langen Kerben (ISO 8743:1997)

Diese Internationale Norm beschreibt die Eigenschaften von Knebelkerbstiften aus Stahl oder aus austenitischem nichtrostendem Stahl, mit langen Kerben, mit drei gleichmäßig verteilten Längskerben auf der Außenfläche. Die Kerbstifte haben einen Nenndurchmesser d1 von 1,5 mm bis einschließlich 25 mm. Der zu jeder Seite der Kerbe verdrängte Werkstoff, der den aufgeweiteten Durchmesser d2 bildet, welcher größer als der Nenndurchmesser d1 ist, führt zu einer kraftschlüssigen Verbindung, wenn diese Kerbstifte in eine Bohrung mit einem Durchmesser gleich dem Nenndurchmesser d1 gepreßt werden.

Goupilles cannelées a cannelures centrales constantes sur la moitié de la longueur non débouchantes (ISO 8743:1997)

La présente Norme internationale prescrit les caractéristiques des goupilles cannelées en acier ou en acier inoxydable austénitique, à trois cannelures centrales constantes sur la moitié de leur longueur, non débouchantes et régulièrement espacées, de diamètre nominal, d1, de 1,5 mm à 25 mm inclus. Le matériau refoulé de chaque côté des cannelures forme un renflement dont le diamètre d2, supérieur au diamètre nominal d1, permet un ajustement serré de ces goupilles cannelées lorsqu'elles sont emmanchées en force dans un trou de diamètre de perçage égal au diamètre nominal de la goupille d1 (voir article 4).

Zasekani zatiči z brazdami enake globine na pol dolžine v sredini (ISO 8743:1997)

General Information

• Status: Published
• Publication Date: 30-Jun-2001
• ICS: 21.060.50 - Pins, nails
• Technical Committee: ISEL - Mechanical elements
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jul-2001
• Due Date: 01-Jul-2001
• Completion Date: 01-Jul-2001
• Ref Project: EN ISO 8743:1997 - Grooved pins - Half-length centre grooved (ISO 8743:1997)

Relations

• Replaces: SIST EN 28743:1996 - Grooved pins - Half-length centre grooved (ISO 8743:1986)
• Effective Date: 01-Jul-2001
• Revised: oSIST prEN ISO 8743:2025 - Grooved pins - Half-length centre grooved (ISO/DIS 8743:2025)
• Effective Date: 05-Nov-2024
• Revises: oSIST prEN ISO 8743:2024 - Fasteners - Grooved pins - Half-length center grooves (ISO/DIS 8743:2023)
• Effective Date: 19-Jan-2023

Overview

SIST EN ISO 8743:2001 is an international standard specifying the requirements for grooved pins with half-length centre grooves. These pins are primarily manufactured from steel or austenitic stainless steel and feature three equally spaced longitudinal grooves on half their length. The grooves create an expanded diameter that allows the pin to provide a non-positive locking fit when inserted into a hole of nominal diameter.

This standard is critical in the field of mechanical fasteners and precision engineering, ensuring compatibility, reliability, and mechanical performance of grooved pins in various assemblies.

Key Topics

• Dimensions and Tolerances
  The standard covers nominal diameters ranging from 1.5 mm to 25 mm with specific tolerances (h9, h11). Detailed dimensional tables provide exact measurements for length, expanded diameter, and groove geometry. The grooves are centrally located over half the pin length.

• Material Specifications
  Material types include carbon steel and austenitic stainless steel. Steel pins generally have a hardness range of 125 HV30 to 245 HV30, while stainless steel pins, conforming to ISO 3506-1, have higher hardness between 210 HV30 and 280 HV30.

• Surface Finish and Coatings
  Pins are typically supplied plain or with a protective lubricant. Optional coatings include black oxide, phosphate coatings, zinc plating with chromate conversion, or other treatments as agreed between customer and supplier. All tolerances apply before coating.

• Mechanical Properties
  Shear strength values are provided for each nominal diameter, ensuring pins meet minimum load bearing requirements. Tests follow ISO 8749 procedures.

• Installation Guidelines
  The hole diameter for pin insertion must match the nominal pin diameter within tolerance class H11 to achieve proper locking fit.

• Designation Format
  Standardized labelling clearly identifies the pin type, dimensions, and material grade, e.g., "Grooved pin ISO 8743 – 6 × 50 – St" for steel or "Grooved pin ISO 8743 – 6 × 50 – A1" for stainless steel.

Applications

Grooved pins conforming to SIST EN ISO 8743:2001 are widely used in:

• Mechanical Assemblies
  Providing precise alignment and secure fastening in machinery, automotive, aerospace, and electronics industries.

• Shear Load Situations
  Due to defined shear strength properties, these pins are suitable for applications where components experience lateral forces.

• Precision Engineering
  Components requiring exact positioning and repeatability benefit from the standardized dimensions and tolerances.

• Corrosion-Resistant Applications
  Austenitic stainless steel versions support usage in harsh or corrosive environments, extending service life.

• Replacement and Interchangeability
  The adherence to international standard dimensions enables easy replacement and compatibility across global supply chains.

Related Standards

• ISO 3506-1: Specifies corrosion-resistant stainless steel fasteners, including hardness criteria relevant to grooved pins.
• ISO 8749: Defines shear test methods used to verify mechanical strength of grooved pins.
• ISO 3269: Governs acceptance inspection procedures for fasteners.
• ISO 9717 & ISO 4042: Cover phosphate conversion coatings and electroplated coatings applied to pins for corrosion protection.

By complying with SIST EN ISO 8743:2001, manufacturers and users ensure quality, durability, and consistent performance of half-length centre grooved pins across diverse industrial sectors.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2001
1DGRPHãþD
SIST EN 28743:1996
=DVHNDQL]DWLþL]EUD]GDPLHQDNHJORELQHQDSROGROåLQHYVUHGLQL,62
Grooved pins - Half-length centre grooved (ISO 8743:1997)
Knebelkerbstifte mit langen Kerben (ISO 8743:1997)
Goupilles cannelées a cannelures centrales constantes sur la moitié de la longueur non
débouchantes (ISO 8743:1997)
Ta slovenski standard je istoveten z: EN ISO 8743:1997
ICS:
21.060.50 =DWLþLåHEOML Pins, nails
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 8743
Second edition
1997-11-01
Grooved pins — Half-length centre grooved
Goupilles cannelées à cannelures centrales constantes sur la moitié
de la longueur non débouchantes
.
A
Reference number
ISO 8743:1997(E)
ISO 8743:1997(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.
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.
International Standard ISO 8743 was prepared by Technical Committee
ISO/TC 2, Fasteners.
This second edition cancels and replaces the first edition (ISO 8743:1986),
which has been technically revised.
©  ISO 1997
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 the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet [e-mail]
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii
©
INTERNATIONAL STANDARD  ISO ISO 8743:1997(E)
Grooved pins — Half-length centre grooved
1 Scope
This International Standard specifies the characteristics of half-length centre grooved pins made of steel or
austenitic stainless steel which have three equally spaced grooves impressed longitudinally on their exterior
surface, with nominal diameter, d , from 1,5 mm to 25 mm inclusive.
The displaced material to each side of the grooves forming an expanded diameter, d , which is larger than the
nominal diameter d will cause a non-positive locking fit when these grooved pins are forced into a drilled hole
equal to the nominal diameter d (see clause 4).
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All standards are subject
to revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the standard
...