British Standards Institution

Source:: ISO
Committee:: FME/9 - Fasteners
Categories:: Limits and fits | Screw threads. Metric
Comment period start date:: 04/09/2024
Comment period end date:: 28/10/2024
Number of comments:: 0

Comment by:

28th Oct

Scope

This document specifies the limits of sizes for major, pitch and minor diameters of ISO metric trapezoidal screw threads (Tr) conforming to ISO 2902 having basic and design profiles in accordance with ISO 2901.This document is applicable to the metric trapezoidal screw threads with the seven recommended tolerance classes specified in ISO 2903. See Table 1.

Please see drafts for Table 1 — The guide for Tr screw threads with the seven recommended tolerance classes

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

21/06/2024

3. Public Comments

Public Comments start date:

04/09/2024

Public Comments end date:

28/10/2024

Learn more about the standards development process

Standards Development

BS ISO 21947 ISO 2903-2 ISO metric trapezoidal screw threads --- Tolerances. Part 2: Limits of sizes

Scope

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