NF ISO 5408
Screw threads - Vocabulary
ISO 5408:2009 specifies the fundamental terms and definitions for screw threads. These terms are applicable to symmetrical threads and unsymmetrical threads, or cylindrical threads and taper threads.
ISO 5408:2009 specifies the fundamental terms and definitions for screw threads. These terms are applicable to symmetrical threads and unsymmetrical threads, or cylindrical threads and taper threads.
La présente norme précise les définitions des termes usuels applicables aux filetages et les termes particuliers aux filetages triangulaires, cylindriques et coniques. Elle s'adresse aux fabricants et utilisateurs de pièces filetées.
The Requirements department helps you quickly locate within the normative text:
- mandatory clauses to satisfy,
- non-essential but useful clauses to know, such as permissions and recommendations.
The identification of these types of clauses is based on the document “ISO / IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents ”as well as on a constantly enriched list of verbal forms.
With Requirements, quickly access the main part of the normative text!

- With a single click, add a new language, the Requirements or Redline+ service and add one or more additional users.
- Whether you are in the process of acquiring a standard or it is already available in your personal space, the UPSELL service is available at every stage to help you understand it and implement it within your organization.
COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.
Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!
Request your free, no-obligation live demo
I discover COBAZ