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

ISO-68-2 - 2ND EDITION - CURRENT
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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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21.040.20 (Inch screw threads Including Whitworth screw threads Pipe threads, see 21.040.30)

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Document Number

ISO 68-2:2023

Revision Level

2ND EDITION

Status

Current

Publication Date

Oct. 1, 2023

Committee Number

ISO/TC 1