General Standards for Self-Locking Nuts

These standards from ISO and SAE cover self-locking nut requirements.

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SAE ARP 1515B-2018

Threaded Fastener Protrusion Through Self-Locking Nuts

To establish a recommended practice for the minimum protrusion of external threaded fasteners through one piece all metal self-locking nuts.

SAE AS 4847B-2018

Shank Nuts, Captive Blind Fastener,Mating Retaining Flange,Design Standard For

This design standard provides information on the use of self-locking shank nuts, thread sizes .1640-36 through .3750-24, together with details of flange hole and abutment shoulder for their installation.

ISO 12280:1999

Aerospace -- Retainers, spring, sheet metal, for self-locking barrel nuts -- Dimensions

This International Standard specifies the dimensions of sheet metal spring retainers intended for use with self-locking barrel nuts, ISO 12278. This International Standard is only applicable for the compilation of aerospace product standards.

ISO 5858:2026

Aerospace - Nuts, self-locking, with maximum operating temperature less than or equal to 425 °C - Procurement specification

This document specifies the required characteristics for metric self-locking nuts, with MJ threads, for use in aerospace construction at a maximum temperature less than or equal to 425 °C. It is applicable to nuts as defined above, provided that reference is made to this document in the relevant definition document.

ISO 7481:2023

Aerospace - Nuts, self-locking, with maximum operating temperature less than or equal to 425 °C - Test methods

This document specifies test methods for metric self-locking nuts with MJ threads intended for use in aerospace construction at maximum operating temperatures less than or equal to 425 °C. It describes the test device and the method for each test. It applies to self-locking nuts as defined above, provided that the relevant documents (dimensional standard, drawing, procurement specification, etc.) refer to this document.

ISO 8641:2008

Aerospace - Self-locking nuts with maximum operating temperature greater than 425 degrees C - Procurement specification

ISO 8641:2008 specifies the required characteristics for metric self-locking nuts, with MJ thread, for use in aerospace construction at a maximum temperature greater than 425 °C. ISO 8641:2008 is applicable to nuts as defined above, provided that reference is made to this International Standard in the relevant definition document.

ISO 8642:2025

Aerospace - Self-locking nuts with maximum operating temperature greater than 425 °C - Test methods

This document specifies test methods for metric self-locking nuts with MJ threads intended for use in aerospace applications at maximum operating temperature greater than 425 °C. It describes the test device and the method for each test. It applies to self-locking nuts as defined above, provided that the relevant documents (dimensional standard, product standard, drawing, procurement specification, etc.) refer to this document.

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