Prevailing torque type hexagon nuts with flange (with non-metallic insert) (ISO 7043:1997, modified)

This European Standard specifies the characteristics of prevailing torque type hexagon nuts with flange, with non-metallic annular insert and coarse threads f from M5 to M20 inclusive, in product grade A for threads up to and including M16and product grade B for threads above M16 and property classes 8 and 10.

Sechskantmuttern mit Klemmteil und Flansch (mit nichtmetallischem Einsatz) (ISO 7043:1997, modifiziert)

Diese Europäische Norm enthält Festlegungen für Sechskantmuttern mit Klemmteil und Flansch (mit nichtmetallischem Einsatz) mit Gewinde von M5 bis M20, in Produktklasse A für Gewinde bis M16 und Produktklasse B für Gewinde u über M16 und Festigkeitsklassen 8 und 10.

Ecrous hexagonaux a embase, autofreinés (avec anneau non métallique) (ISO 7043:1997, modifiée)

La présente Norme européenne définit les caractéristiques des écrous hexagonaux à embase, autofreinés, (avec anneau non métallique), de filetage M5 à M20 inclus, de grade A pour filetages M16 et classes de qualité 8 et 10.

Šestrobe zaščitne matice s plastičnim vložkom s poševnim krajcem (ISO 7043:1997, dopolnjen)

General Information

Status
Published
Publication Date
30-Jun-2001
ICS
21.060.20 - Nuts
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 1663:1997 - Prevailing torque type hexagon nuts with flange (with non-metallic insert) (ISO 7043:1997, modified)

Overview

EN 1663:1997 (CEN) covers prevailing-torque type hexagon nuts with flange that include a non‑metallic annular insert. The standard applies to coarse thread sizes M5 to M20 inclusive and references ISO 7043:1997 (modified). It defines product grades and property classes 8 and 10, establishing the characteristics required for reliable fastening performance where vibration resistance is needed.

Key topics and requirements

  • Product scope: Prevailing-torque hexagon nuts with integral flange and a non‑metallic annular insert for coarse threads (designated “f”) from M5 to M20.
  • Product grades:
    • Grade A for threads up to and including M16
    • Grade B for threads above M16
  • Property classes: Applies to nuts manufactured to property classes 8 and 10, indicating mechanical performance categories.
  • Performance focus: Specifies the characteristics and performance expected of prevailing-torque nuts - notably the presence and function of the non‑metallic insert to provide frictional resistance (prevailing torque) and reduce self-loosening.
  • Standards relationship: Identical or derived from ISO 7043:1997 (modified) as indicated in the document extract; published under the European Standard system by CEN.

(Note: EN 1663 sets the required characteristics and classification; specific dimensional tables, test methods or torque values are defined in the full standard text.)

Applications

  • Mechanical and structural assemblies where vibration or dynamic loading can cause fastener loosening.
  • Automotive, rail, and heavy equipment applications requiring reliable clamp force retention.
  • Industrial machinery, plant engineering, and construction where flange nuts with integrated bearing face and lock insert improve assembly repeatability and maintenance.
  • Procurement, quality control and specification: Used by purchasing agents to specify compliant fasteners, by manufacturers for product design and testing, and by inspection labs for conformity checks.

Who should use EN 1663:1997

  • Fastener and component manufacturers designing or producing prevailing-torque hexagon flange nuts.
  • Design engineers specifying nuts for vibration‑resistant joints.
  • Quality and compliance teams performing acceptance testing or supplier audits.
  • Procurement specialists creating technical purchase specifications for nuts in property classes 8 and 10.

Related standards

  • ISO 7043:1997 (base document referenced and modified by EN 1663:1997)

Keywords: EN 1663:1997, prevailing torque nut, hexagon nut with flange, non‑metallic insert, ISO 7043, coarse threads M5–M20, product grade A/B, property class 8, property class 10, CEN standard.

Frequently Asked Questions

SIST EN 1663:2001 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Prevailing torque type hexagon nuts with flange (with non-metallic insert) (ISO 7043:1997, modified)". This standard covers: This European Standard specifies the characteristics of prevailing torque type hexagon nuts with flange, with non-metallic annular insert and coarse threads f from M5 to M20 inclusive, in product grade A for threads up to and including M16and product grade B for threads above M16 and property classes 8 and 10.

This European Standard specifies the characteristics of prevailing torque type hexagon nuts with flange, with non-metallic annular insert and coarse threads f from M5 to M20 inclusive, in product grade A for threads up to and including M16and product grade B for threads above M16 and property classes 8 and 10.

SIST EN 1663:2001 is classified under the following ICS (International Classification for Standards) categories: 21.060.20 - Nuts. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 1663:2001 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.,62Sechskantmuttern mit Klemmteil und Flansch (mit nichtmetallischem Einsatz) (ISO 7043:1997, modifiziert)Ecrous hexagonaux a embase, autofreinés (avec anneau non métallique) (ISO 7043:1997, modifiée)Prevailing torque type hexagon nuts with flange (
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