ISO 68-2:2023
ISO 68-2:2023

Status : Published

Format Language
std 1 63 PDF + ePub
std 2 63 Paper
  • CHF63
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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.

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General information

  •  : Published
     : 2023-10
    : International Standard published [60.60]
  •  : 2
     : 8
  • ISO/TC 1
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Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

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