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ISO 68-2:2023

ISO general purpose screw threads — Basic and design profiles — Part 2: Inch screw threads ISO 68-2:2023

Publication date:   Oct 5, 2023

General information

60.60 Standard published   Oct 5, 2023

ISO

ISO/TC 1 Screw threads

International Standard

21.040.20   Inch screw threads

Buying

Published

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Scope

This document specifies the basic and design profiles for ISO inch screw threads (UN and UNR).
UN applies to both internal and external threads. UNR only applies to external threads. A flat or rounded root contour, due to the threading process, is specified for UN threads, while only a defined rounded root contour is specified for UNR external threads.
This document is applicable to the inch fastening screw threads.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 68-2:1998

WITHDRAWN
ISO 68-2:1998/Amd 1:2020

NOW

PUBLISHED
ISO 68-2:2023
60.60 Standard published
Oct 5, 2023