British Standards Institution

Source:: ISO
Committee:: FME/9 - Fasteners
Categories:: Nuts
Comment period start date:: 05/06/2024
Comment period end date:: 29/07/2024
Number of comments:: 0

Comment by:

29th Jul

Scope

This document specifies the characteristics of prevailing torque hexagon regular nuts (with non‑metallic insert), in steel and stainless steel, with metric coarse pitch thread M3 to M39, and with product grades A and B.

NOTE 1 These nuts are designed with an overall height equal to mmin (as specified in ISO 898-2 and ISO 4032 for style 1) plus the prevailing torque feature. The height of the prevailing torque feature (hmax – mmin) for the non-metallic insert is identical for regular, high and thin nuts for a given diameter.

Nuts with sizes D < M5 and design principles in accordance with style 1 are specified in Annex A.

If in certain cases other specifications are requested, property classes and stainless steel grades can be selected from ISO 898-2 or ISO 3506-2.

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

04/04/2024

3. Public Comments

Public Comments start date:

05/06/2024

Public Comments end date:

29/07/2024

Learn more about the standards development process

Standards Development

BS EN ISO 7040 ISO 7040 Fasteners. Prevailing torque hexagon nuts. Regular nuts (with non-metallic insert)

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