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naSRPS ISO 68-2:2026

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

General information

40.20     Oct 8, 2026

40.60    Nov 9, 2026

ISS

M010

International Standard

21.040.20  

Serbian  

Buying

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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

PUBLISHED
SRPS ISO 68-2:2007

NOW

PROJECT
naSRPS ISO 68-2:2026
40.20 DIS ballot initiated: 12 weeks
Oct 8, 2026

Related project

Adopted from ISO 68-2:2023 IDENTICAL

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