oSIST prEN ISO 2702:2019

Fasteners - Heat-treated steel tapping screws - Mechanical and physical properties (ISO/DIS 2702:2019)

2020-03-29: WI abandoned following cancellation of equivalent ISO WI

Mechanische Verbindungselemente - Wärmebehandelte Blechschrauben - Mechanische und physikalische Eigenschaften (ISO/DIS 2702:2019)

Fixations - Vis à tôle en acier traité thermiquement - Caractéristiques mécaniques et physiques (ISO/DIS 2702:2019)

Vezni elementi - Toplotno obdelani pločevinski vijaki - Mehanske in fizikalne lastnosti (ISO/DIS 2702:2019)

General Information

• Status: Not Published
• Public Enquiry End Date: 27-Jun-2019
• ICS: 21.060.10 - Bolts, screws, studs
• Technical Committee: ISEL - Mechanical elements
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 04-Jun-2024
• Due Date: 09-Jun-2024
• Completion Date: 04-Jun-2024
• Ref Project: prEN ISO 2702 - Fasteners - Heat-treated steel tapping screws - Mechanical and physical properties (ISO/DIS 2702:2019)

Relations

• Revised: SIST EN ISO 2702:2011 - Heat-treated steel tapping screws - Mechanical properties (ISO 2702:2011)
• Effective Date: 18-Jan-2023
• Revised: SIST EN ISO 2702:2011 - Heat-treated steel tapping screws - Mechanical properties (ISO 2702:2011)
• Effective Date: 16-Nov-2016

Overview

oSIST prEN ISO 2702:2019 specifies the mechanical and physical properties of heat-treated steel self-tapping screws, establishing essential requirements and testing methods for such fasteners. Developed by the Slovenian Institute for Standardization (SIST) as a member of the European and International Standards community, this standard plays a critical role in ensuring the reliability and consistency of self-tapping screws used in a wide range of industries. These requirements are essential for manufacturers, engineers, and purchasers who demand high-quality, standardized fastening solutions.

Key Topics

• Scope and Applicability: Defines requirements for self-tapping screws made of heat-treated steel with threads ranging from ST2.2 to ST9.5, as outlined in ISO 1478.
• Mechanical Properties:
  • Surface hardness: Specifies a minimum surface hardness after heat treatment to ensure durability.
  • Case-hardened depth: Standardizes depth profiles to protect fastener longevity and performance.
  • Core hardness: Sets minimum and maximum core hardness values, depending on screw size.
  • Thread-forming capability: Ensures screws can create mating threads in host materials without damaging themselves.
  • Torsional strength: Establishes minimum breaking torque values across thread sizes for safe application.
• Physical Properties:
  • Microstructure: Screws must show appropriate metallurgical properties, such as absence of free ferrite bands between the case-hardened zone and core.
• Testing Methods:
  • Surface hardness testing: Performed using the Vickers method (ISO 6507-1).
  • Case-hardened depth and core hardness: Defined locations and procedures for consistent results.
  • Drive and torsional tests: Procedures to verify thread-forming ability and resistance to breakage under torque.

Applications

The requirements of oSIST prEN ISO 2702:2019 apply to manufacturers, testing laboratories, and end-users involved in:

• Automotive industry: For assembly of body panels, interior panels, and components where consistent screw performance is crucial.
• Construction: Used in sheet metal works, HVAC systems, and light steel structures, where secure fastening is essential.
• Consumer electronics and appliances: Ensures reliability in devices where panels and casings are frequently secured with self-tapping screws.
• General manufacturing: Provides guidance for procurement and quality assurance when sourcing fasteners for production lines.

Standardized properties and test methods minimize the risk of installation failures and improve compatibility across manufacturers, contributing to safer products and more efficient production cycles.

Related Standards

Organizations adhering to oSIST prEN ISO 2702:2019 should also consider these related standards for a comprehensive quality approach:

• ISO 1478: Specifies threading for tapping screws.
• ISO 6507-1: Lays out the Vickers hardness test method for metallic materials.
• ISO 898 series: Pertains to mechanical properties of fasteners in general.
• EN ISO 4042: Covers the requirements for electroplated coatings on steel fasteners.

By following these standards together, companies ensure full compliance and product quality from material selection through to final assembly.

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Keywords: oSIST prEN ISO 2702, ISO 2702:2019, fasteners standard, self-tapping screws, heat-treated steel fasteners, mechanical properties, physical properties, standardization, SIST, industrial screws, screw testing, compliance, ISO standards for fasteners.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2019
9H]QLHOHPHQWL7RSORWQRREGHODQLSORþHYLQVNLYLMDNL0HKDQVNHLQIL]LNDOQH
ODVWQRVWL,62',6
Fasteners - Heat-treated steel tapping screws - Mechanical and physical properties
(ISO/DIS 2702:2019)
Mechanische Verbindungselemente - Wärmebehandelte Blechschrauben - Mechanische
und physikalische Eigenschaften (ISO/DIS 2702:2019)
Fixations - Vis à tôle en acier traité thermiquement - Caractéristiques mécaniques et
physiques (ISO/DIS 2702:2019)
Ta slovenski standard je istoveten z: prEN ISO 2702
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 2702
ISO/TC 2/SC 13 Secretariat: DIN
Voting begins on: Voting terminates on:
2019-04-05 2019-06-28
Fasteners — Heat-treated self-tapping screws —
Mechanical and physical properties
ICS: 21.060.10
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
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STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 2702:2019(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2019

ISO/DIS 2702:2019(E)
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
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ii © ISO 2019 – All rights reserved

ISO/DIS 2702:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Materials . 1
5 Mechanical and physical properties . 1
5.1 General . 1
5.2 Surface hardness . 1
5.3 Case-hardened depth. 1
5.4 Core hardness . 2
5.5 Microstructure . 2
5.6 Thread-forming ability . 2
5.7 Torsional strength . 2
6 Test methods . 3
6.1 General . 3
6.2 Surface hardness test . 3
6.3 Case-hardened depth determination . 3
6.4 Core hardness test . 4
6.5 Microstructure test . 4
6.6 Drive test . 4
6.7 Torsional test . 5
ISO/DIS 2702:2019(E)
Foreword
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