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ISO/DIS 272

Fasteners — Hexagon products — Widths across flats

General information

40.20     Jul 1, 2026

ISO

ISO/TC 2/SC 7

International Standard

21.060.01  

Scope

Specifies the widths to be used in the respective product standards; it sets out a logical ratio between underhead (or nut) bearing area and the tensile stress area of the screw thread.

Life cycle

PREVIOUSLY

PUBLISHED
ISO 272:1982

NOW

IN_DEVELOPMENT
ISO/DIS 272
40.20 DIS ballot initiated: 12 weeks
Jul 1, 2026

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