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ISO/DIS 272

Fasteners — Hexagon products — Widths across flats

General information

Current stage: 40.00 Effective date: 28 pri 2026

Originator: ISO

Owner: ISO/TC 2/SC 7

Type: International Standard

ICS: 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
40.00 DIS registered
28 pri 2026