ISO 5858:1999

Name: ISO 5858:1999 — Aerospace — Nuts, self-locking, with maximum operating temperature less than or equal to 425 degrees C — Procurement specification
SKU: ISO 5858:1999
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Aerospace — Nuts, self-locking, with maximum operating temperature less than or equal to 425 degrees C — Procurement specification

Название (английский):

ISO 5858:1999

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

Статус документа:: Отменён
Формат:: Электронный (PDF)
Количество страниц:: 26
Дата публикации:: 18 ноября 1999 г.
Издание:: ISO IS 5858 edition 2 version 1
ICS:: 49.030.30

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Описание (английский):

This International Standard 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 International Standard in the relevant definition document.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 5858:1999 is an international procurement specification for metric self-locking nuts with MJ threads intended for aerospace use at a maximum operating temperature ≤ 425 °C. The standard specifies the required characteristics, inspection and test regimes, quality assurance, sampling plans and acceptance criteria for finished nuts. It is intended to be referenced in a nut’s definition document (drawing, national or in‑house standard) to make the requirements contractually binding.

Key topics and technical requirements

Scope and applicability: Covers metric self‑locking nuts used in aerospace construction where operating temperature does not exceed 425 °C.

Material and microstructure: Requires verification of material type (spectrographic/spectroscopic analysis) and micrographic inspection to ensure freedom from cracks and control of inclusions.

Carburization/decarburization: Limits on total and partial decarburization; thickness of partial decarburization is controlled (inspection by microscopy or Vickers microhardness per referenced methods).

Surface discontinuities: Permissible types and maximum depths are defined (normative Annex A); cracks are prohibited. Magnetoscopic or penetrant inspection methods are referenced.

Thread and dimensional control: MJ thread limits and related dimensions are to be met; the standard complements dimensional limits in ISO 5855‑2.

Mechanical and functional characteristics: Definitions and requirements for self‑locking torque, seating/unseating torque, breakaway torque, and wrench torque are provided to ensure functional performance.

Quality assurance and inspection:

Manufacturer approval and quality system per ISO 9002.
Qualification tests performed on each type/diameter - typically 100 nuts sampled from a single batch.
Production acceptance inspections on each batch using sampling plans (AQL concepts from ISO 2859‑1).
Option to use Statistical Process Control (SPC) in lieu of final sampling when validated and approved.

Sampling and test methods: References numerous normative documents for specific test procedures (e.g., ISO 3452 for penetrant inspection, ISO 3887 for decarburization measurements).

Applications

Procurement and acceptance of high‑temperature aerospace fasteners for airframe, engine accessory, and other critical assemblies.

Use in specification clauses on purchase orders, qualification dossiers, supplier approvals and quality control plans.

Basis for supplier audits, lot release, and functional testing of self‑locking nuts rated up to 425 °C.

Related standards

Relevant referenced documents include ISO 5855‑2 (MJ threads), ISO 7481 (test methods for self‑locking nuts to 425 °C), ISO 2859‑1 (sampling/AQL), ISO 3452 (penetrant inspection), ISO 3887 (decarburization) and ISO 9002 (quality systems). These should be consulted for specific test procedures and dimensional limits.

ISO 5858:1999

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications

Who uses this standard

Related standards

Технические детали

ISO 5855-2:1999

Aerospace — MJ threads — Part 2: Limit dimensions for bolts and nuts

BS ISO 28591:2017

Sequential sampling plans for inspection by attributes.

ISO 3452-2:2006

Non-destructive testing — Penetrant testing — Part 2: Testing of penetrant materials

BS EN ISO 3887:2023

Steels. Determination of the depth of decarburization.

ISO 7481:2023

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