prBAS ISO 68-2:2025
ISO general purpose screw threads — Basic and design profiles — Part 2: Inch screw threads
General information
Status:Project
Number of pages:112
Adoption method:Korice
Language:engleski
Edition:2.
Realization date:23.10.2024
Forseen date for next stage code:18.03.2025
Technical committee:BAS/TC 16, Mechanical elements
ICS:
21.040.20, Inch screw threads
Abstract
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.
Lifecycle
...
Original document and degree of correspondence
ISO 68-2:2023, identical
Relation to BAS standards
Work material
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