ISO 9154-2016 PDF

Full title and description

ISO 9154:2016 — Aerospace — Bolts, with MJ threads, made of heat-resistant nickel‑based alloy, strength class 1 550 MPa — Procurement specification. This international standard specifies the characteristics, manufacturing and quality assurance requirements for MJ‑thread bolts manufactured from heat‑resisting nickel‑base alloys for use in aerospace construction and procurement documents.

Abstract

Specifies dimensional, material, mechanical‑property and quality assurance requirements for bolts having MJ threads and made from heat‑resisting nickel‑base alloys with a minimum strength classification of 1 550 MPa. Applies wherever this procurement specification is referenced in design or purchase documentation for aerospace components.

General information

• Status: Published (confirmed on review).
• Publication date: February 2016 (Edition 2 — published 18 February 2016 in ISO cataloguing).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.030.20 (Aerospace fastener systems / screws, bolts, studs).
• Edition / version: Edition 2 (2016).
• Number of pages: 25 (ISO published document page count).

Scope

Governs procurement specification requirements for bolts with MJ thread form made of heat‑resisting nickel‑base alloys, rated as strength class 1 550 MPa, intended for aerospace construction. The standard is intended to be called up by design or procurement documents and defines material, dimensional, mechanical, heat‑treatment and inspection/quality assurance provisions necessary for procurement and acceptance.

Key topics and requirements

• Designation of material: heat‑resisting nickel‑base alloy(s) suitable for aerospace high‑temperature use and able to meet the 1 550 MPa strength classification at ambient conditions.
• Thread form and tolerances: MJ thread profile and associated tolerance classes required for aerospace fasteners (MJ profile provides a controlled root radius and tightened tolerances to improve fatigue resistance).
• Dimensional and mechanical requirements: bolt dimensions, strength class, proof/load/tensile requirements, and permissible test temperatures and conditions for qualification and lot acceptance.
• Manufacturing and heat‑treatment controls: specified forging/processing, heat‑treatment sequence and records, plus surface condition and any plating/passivation requirements where applicable.
• Inspection, testing and QA: non‑destructive and destructive testing as required, sampling plans, traceability, material certificates and documentation required for procurement acceptance.
• Application and procurement note: applies when referenced in contract/design documents — it is a procurement specification rather than a general dimensional standard.

Typical use and users

Used by aerospace designers, fastener manufacturers, procurement/specification engineers, quality assurance and inspection personnel, and suppliers of high‑temperature nickel‑base alloy bolts for aircraft and spacecraft structures and engines. It is invoked in purchase orders, part‑specifications and procurement contracts where MJ‑thread, high‑temperature bolts are required.

Related standards

Standards and specifications commonly referenced with ISO 9154:2016 include the MJ‑thread profile and dimensional standards (e.g., ISO 5855 series for MJ threads), regional technical specifications for MJ‑thread bolts made of specific alloys (examples include EN/TS specifications such as the EN technical specification for MJ bolts in Inconel 718), and the previous ISO 9154:1999 which was superseded by the 2016 edition.

Keywords

aerospace; bolt; MJ thread; MJ thread bolt; nickel‑base alloy; heat‑resisting alloy; Inconel; strength class 1550 MPa; procurement specification; ISO/TC 20/SC 4.

FAQ

Q: What is this standard?

A: ISO 9154:2016 is an ISO procurement specification that defines requirements for bolts with MJ threads made from heat‑resisting nickel‑base alloys, strength class 1 550 MPa, intended for aerospace applications.

Q: What does it cover?

A: It covers material designation, dimensional and thread form requirements (MJ profile), mechanical and strength requirements, manufacturing and heat‑treatment controls, inspection and testing, and documentation/traceability required for procurement and acceptance.

Q: Who typically uses it?

A: Aerospace OEMs, fastener manufacturers and suppliers, procurement engineers, and QA/inspection staff who specify or accept MJ‑thread bolts for high‑temperature aerospace service use this standard.

Q: Is it current or superseded?

A: ISO 9154:2016 is the current edition (Edition 2, 2016) that replaced ISO 9154:1999. The 2016 edition was confirmed in a subsequent review (confirmed status noted in ISO records). Users should check the ISO catalogue or their national standards body for any later amendments or confirmations.

Q: Is it part of a series?

A: It is a standalone procurement specification for a specific bolt type but is used in conjunction with MJ thread standards (for example the ISO 5855 series) and other alloy‑specific or region‑specific technical specifications that address particular materials or finishing requirements.

Q: What are the key keywords?

A: MJ thread, aerospace bolt, nickel‑base alloy, heat‑resisting, 1550 MPa, procurement specification, ISO 9154.