Foreword

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This document was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 11, Fasteners with metric external thread, in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 185, Fasteners, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This second edition cancels and replaces the first edition (ISO 4015:1979), which has been technically revised.

The main changes are as follows:

— the indentation on the head and the washer-face under the head have been left to the choice of the manufacturer, however limits for dimensions have been added;
— tables for dimensions have been restructured;
— M3,5, M7 and M18 have been added;
— d _w,min has been changed for sizes d ≤ M5 from s_min − IT16 to s_min − IT15 in order to have a larger bearing surface area and thus less contact pressure, and its values for d > M5 have been recalculated in accordance with ISO 4759‑1 without rounding off;
— values for k_w,min have been recalculated in accordance with ISO 4759‑1 without rounding off;
— value for e_min has been corrected for M3;
— addition of property class 6.8 for steel bolts and property class 50 for stainless steel bolts;
— non-ferrous metal bolts have been deleted;
— specifications for marking and labelling have been added as Clause 6.

Any feedback or questions on this document should be directed to the user's national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

BS EN ISO 4015:2022

Fasteners. Hexagon head bolts with reduced shank (shank diameter ≈ pitch diameter). Product grade B

Current

Published:

31 Aug 2022