ISO 10513-2025 PDF

Full title and description

ISO 10513:2025 — Fasteners — Prevailing torque hexagon nuts — High nuts (all metal), with fine pitch thread. Third edition, published 13 June 2025; specifies design and characteristic requirements for all‑metal prevailing‑torque hexagon high nuts with metric fine‑pitch threads.

Abstract

This document specifies the characteristics of prevailing‑torque (all‑metal) hexagon high nuts, in steel and stainless steel, with metric fine pitch thread in the nominal diameter range covered by the standard and with product grades A and B. It defines dimensional requirements, the prevailing‑torque feature and applicable material/property selections and references related ISO product standards.

General information

• Status: Published.
• Publication date: 13 June 2025.
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 21.060.20 (Nuts).
• Edition / version: Edition 3 (2025).
• Number of pages: 6.

Scope

ISO 10513:2025 covers prevailing‑torque, all‑metal hexagon high nuts with metric fine‑pitch threads. The standard sets out the dimensional limits, tolerances, prevailing‑torque feature requirements, applicable product grades (A and B) and the nominal thread diameter range addressed by the standard. It also notes how hmin/hmax and wrenching heights relate to the referenced nut style standards and indicates that property classes and stainless steel grades can be selected from ISO 898‑2 and ISO 3506‑2 where required.

Key topics and requirements

• Definition and identification of prevailing‑torque (all‑metal) hexagon high nuts.
• Dimensional requirements and tolerances specific to high nuts with fine‑pitch metric threads.
• Accepted material families (steel and stainless steel) and reference to property classes.
• Product grades A and B and nominal thread diameter coverage as specified in the standard.
• References to related ISO standards for thread, material and mechanical property selection.

Typical use and users

Used by fastener manufacturers, mechanical design engineers, procurement and quality assurance teams, test laboratories, conformity assessment bodies and standards committees. Typical applications are mechanical assemblies where a reliable prevailing torque (self‑locking) nut is required and where fine‑pitch metric threads are specified.

Related standards

Commonly used together with ISO 898‑2 (mechanical properties of nuts), ISO 8674 (hexagon nuts style 2 with fine pitch), ISO 3506‑2 (stainless steel fasteners) and related ISO documents covering nut and fastener dimensions and test methods. National/adopted versions and EN equivalents (where applicable) may also exist.

Keywords

prevailing torque, all‑metal, hexagon high nut, fine pitch thread, metric thread, product grade A, product grade B, ISO 10513:2025, fasteners, nuts

FAQ

Q: What is this standard?

A: ISO 10513:2025 is an international standard that specifies requirements for prevailing‑torque (all‑metal) hexagon high nuts with metric fine‑pitch threads.

Q: What does it cover?

A: It covers dimensional, tolerance and functional requirements for high nuts with an all‑metal prevailing‑torque feature, applicable materials (steel and stainless steel), product grades and nominal thread ranges; it also references other ISO standards for property classes and material selection.

Q: Who typically uses it?

A: Fastener producers, mechanical designers, procurement and QA/QC personnel, testing laboratories and conformity assessors who need standardised specifications for prevailing‑torque high nuts.

Q: Is it current or superseded?

A: ISO 10513:2025 is the current edition (published 13 June 2025) and supersedes ISO 10513:2012 (withdrawn).

Q: Is it part of a series?

A: It is part of the family of ISO fastener and nut standards addressing dimensions, mechanical properties and materials (for example ISO 898‑2, ISO 8674, ISO 3506‑2) and has parallels/EN adoptions in regional standards bodies.

Q: What are the key keywords?

A: Prevailing torque; all‑metal; hexagon high nut; fine‑pitch metric thread; ISO 10513; fasteners; product grade A; product grade B.