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ISO/FDIS 16224

Fasteners — Calculation methods for bolt/nut assemblies — Nut design

General information

50.20     Apr 14, 2026

ISO

ISO/TC 2/SC 12

International Standard

21.060.20  

Scope

This document specifies design criteria for nuts specified in ISO 898-2 so that, under static tensile overload, the stripping fracture mode is prevented.

The design criteria are also applicable to non-standardized nuts or internally threaded elements with ISO metric screw threads (in accordance with ISO 68-1) mating with bolts. However, dimensional factors such as the width across flats or other features related to rigidity of nuts, and thread tolerances can affect the load ability of the individual bolt and nut assemblies. Therefore, it is intended that verification tests be carried out.

Life cycle

PREVIOUSLY

PUBLISHED
ISO/TR 16224:2012

NOW

PROJECT
ISO/FDIS 16224
50.20 Proof sent to secretariat or FDIS ballot initiated: 8 weeks
Apr 14, 2026

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