British Standards Institution

Source:: ISO
Committee:: ACE/12 - Aerospace fasteners and fastening systems
Categories:: Nuts
Comment period start date:: 29/04/2025
Comment period end date:: 14/06/2025
Number of comments:: 0

Comment by:

14th Jun

Scope

This International Standard specifies the required characteristics for metric plain or slotted (castellated) nuts, with MJ threads according to ISO 5855‑2, for use in aerospace construction.

It is applicable to nuts as defined above, provided that reference is made to this International Standard in the relevant definition document.

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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:

13/02/2025

3. Public Comments

Public Comments start date:

29/04/2025

Public Comments end date:

14/06/2025

Learn more about the standards development process

Standards Development

BS ISO 9139 Aerospace — Nuts, plain or slotted (castellated) — Procurement specification

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