ISO 8168-2016 PDF

Full title and description

ISO 8168:2016 — Aerospace — Bolts, with MJ threads, made of heat and corrosion resisting steel, strength class 1 100 MPa — Procurement specification. This procurement specification defines the required characteristics, manufacturing and inspection/quality-assurance requirements for MJ‑thread bolts used in aerospace applications.

Abstract

ISO 8168:2016 specifies the characteristics and quality‑assurance requirements for MJ thread bolts made of heat‑ and corrosion‑resisting steel, of strength class 1 100 MPa, for aerospace construction. It is intended to be applied when referenced by a contract, drawing or other defining document.

General information

• Status: Withdrawn (withdrawal registered 25 July 2025; superseded by ISO 8168:2025).
• Publication date: August 2016 (Edition 3, published 2016‑08).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.030.20 (Bolts, screws, studs).
• Edition / version: Edition 3 (2016).
• Number of pages: 21 pages.

Scope

Applies to procurement specification of MJ‑thread bolts manufactured from heat‑ and corrosion‑resisting steel with nominal strength classification 1 100 MPa for aerospace use; establishes mandatory characteristics and quality assurance requirements to be referenced by purchasers and designers.

Key topics and requirements

• Definition of material and mechanical property requirements (strength class 1 100 MPa) and acceptance/testing methods.
• Manufacturing process controls (forging/heat treatment and thread forming practices) and permitted processing limits.
• Surface condition, coating and finish requirements, including surface texture guidance.
• Sampling, lot/ batch definitions and statistical acceptance (sampling plans, defect classification and re‑inspection procedures).
• Specified destructive and non‑destructive tests (tensile, shear, penetrant inspection, use of test bars where applicable).
• Documentation, traceability and retention of quality records (procurement/inspection certificates and evidence of conformity).

Typical use and users

Used by aerospace OEMs, suppliers and procurement organizations for specifying MJ‑thread bolts in aircraft and aerospace structures; also used by fastener manufacturers, quality/inspection teams, and certification bodies for supplier qualification and batch acceptance.

Related standards

Referenced and related standards typically include bolt/thread dimension and test standards, for example standards addressing MJ thread dimensions, tensile testing, bolt test methods, surface texture, penetrant testing and sampling procedures. ISO 8168:2016 has subsequently been revised and replaced by ISO 8168:2025.

Keywords

ISO 8168, aerospace bolts, MJ threads, heat‑resisting steel, corrosion‑resisting steel, strength class 1 100 MPa, procurement specification, fastener quality, sampling, mechanical tests.

FAQ

Q: What is this standard?

A: A procurement specification for MJ‑thread bolts in aerospace applications (heat and corrosion‑resisting steel, strength class 1 100 MPa) published by ISO as ISO 8168:2016.

Q: What does it cover?

A: Characteristics, manufacturing/processing controls, mechanical and nondestructive test requirements, sampling/inspection and quality‑assurance documentation required when the specification is referenced by purchasers or designers.

Q: Who typically uses it?

A: Aerospace OEMs and suppliers, fastener manufacturers, procurement and quality/inspection personnel, and certification/auditing bodies involved in aerospace fastener supply chains.

Q: Is it current or superseded?

A: ISO 8168:2016 has been withdrawn and superseded by ISO 8168:2025; users should reference the 2025 edition for the current published requirements.

Q: Is it part of a series?

A: It is part of ISO deliverables under ISO/TC 20/SC 4 (aerospace fastener systems) and relates to other fastener and test standards that define thread dimensions, tensile and inspection methods; purchasers often reference it alongside complementary standards for tests and sampling.

Q: What are the key keywords?

A: MJ threads, aerospace bolts, procurement specification, strength class 1 100 MPa, heat‑resisting steel, corrosion‑resisting steel, quality assurance, sampling, tensile test, penetrant testing.