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ISO 7042:2025

Fasteners — Prevailing torque hexagon nuts — High nuts (all metal)

Standard Details

This document specifies the characteristics of prevailing torque (all metal) hexagon high nuts, 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 heigth hmin = mmin (as specified in ISO 898-2 and ISO 4033 for style 2) plus the prevailing torque feature. hmax has been established in function of hmin; therefore, the tolerance (hmax – hmin) does not follow the ISO code system for tolerances (IT system). The wrenching height mw,min corresponds to the values specified for style 1.

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.

General Information

Status : Published
Standard Type: Main
Document No: ISO 7042:2025
Document Year: 2025
Pages: 6
Edition: 4

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ISO 7042:2025

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