Foreword

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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 document 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).

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This document was prepared by Technical Committee ISO/TC 2, Fasteners, in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 185 Fasteners, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This third edition cancels and replaces the second edition (ISO 3506-3:2009), which has been technically revised.

The main changes are as follows:

— annexes common to several parts of the ISO 3506 series have been withdrawn from this document and are now included in the new ISO 3506-6 which is to be used with this document;
— austenitic stainless steel of grade A8 and duplex (austenitic-ferritic) stainless steels of grades D2 to D8 for hardness class 21H have been added (see Figure 1);
— operational temperature ranges have been clarified (see Clause 1);
— terms and definitions have been added (see Clause 3);
— wording for surface conditions and corrosion resistance have been improved (see 5.2 and 5.3);
— manufacturer’s, supplier’s and purchaser’s inspections have been added (see Clause 7);
— hardness test and proof torque test methods have been improved (see Clause 8);
— marking and labelling have been improved (see Clause 9);
— structure and content of this document have been brought in line with other parts of ISO 3506 published recently.

A list of all parts in the ISO 3506 series can be found on the ISO website.

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.

ISO 3506-3:2025

Fasteners. Mechanical properties of corrosion resistant stainless steel fasteners - Set screws (and similar fasteners not under tensile stress) with specified grades and hardness classes

Current

Published:

10 Jan 2025