ISO-68-2 › ISO general purpose screw threads - Basic and design profiles - Part 2: Inch screw threads
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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.
To find similar documents by classification:
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