Standard

BS ISO 9139:2026

Aerospace. Nuts, plain or slotted (castellated). Procurement specification

Current

•

Published:

31 May 2026

1 Scope

This document 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 document in the relevant definition document.

Product Details

Descriptors

Corrosion resistance

Torque

Labels

Destructive testing

Dimensions

Internal-thread fasteners

Statistical quality control

Threaded fasteners

Visual inspection (testing)

Quality assurance

Hardness

Adhesion

Non-destructive testing

Sampling methods

Approval testing

Castellated-head fasteners

Acceptance (approval)

Surface defects

Classification systems

Nuts

Surface properties

Physical properties of materials

Quality control

Performance

Aircraft components

Magnetic properties of materials

Conformity

MJ threads

Fasteners

Tensile strength

ICS Codes

49.030.30 Nuts

Committee

ACE/12

International relationships

Identical to:

ISO 9139:2026

ISBN

978 0 539 29219 0

Publisher

BSI