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ISO/CD 272

Fasteners — Hexagon products — Widths across flats

General information

Current stage: 30.60 Effective date: 24 gush 2025

Originator: ISO

Owner: ISO/TC 2/SC 7

Type: International Standard

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/CD 272
30.60 Close of voting/ comment period
24 gush 2025