Standard

BS EN ISO 7041:2025

Fasteners — Prevailing torque hexagon nuts — High nuts (with non-metallic insert)

Current

•

Published:

30 Jun 2025

1 Scope

This document specifies the characteristics of prevailing torque hexagon high nuts (with non‑metallic insert), in steel and stainless steel, with metric coarse pitch thread M5 to M39, and with product grades A and B.

NOTE These nuts are designed with an overall height equal to m_min (as specified in ISO 898‑2 and ISO 4033 for style 2) plus the prevailing torque feature. The height of the prevailing torque feature (h_max – m_min) for the non-metallic insert is identical for regular, high and thin nuts for a given diameter.

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.

BSI recommends this version of standard for organisations operating in or with the UK. The ISO edition is available here if required.

Product Details

Descriptors

Nuts

Internal-thread fasteners

Finishes

Thread inserts

Dimensions

Dimensional tolerances

Threaded fasteners

Hexagonal-head fasteners

Threads

Grades (quality)

Thread pitch

Fasteners

Designations

Torque

ICS Codes

21.060.20 Nuts

Committee

FME/9

International relationships

Identical to:

ISO 7041

EN ISO 7041

ISBN

978 0 539 21876 3

Publisher

BSI