Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of ISO document should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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This document was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 4, Aerospace fastener systems.

This fourth edition cancels and replaces the third edition ( ISO 8168:2016 ), which has been technically revised.

The main changes are as follows:

editorial revision of the document;
new tables for sampling;
additional requirements in Table 1, item no 2 "Dimensions";
additional requirements in Table 1 item no 4-1 "Tensile strength";
additional requirements in Table 1 item no 4-3 "Hardness";
additional requirements in Table 1 item no 4 "Recess removal torque".

Any feedback or questions on this document should be directed to the user’s national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.

1 Scope

This document 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 applicable whenever it is referenced in a definition document.

2 Normative references

3 Terms and definitions

4 Quality assurance

4.1 General

4.2 Qualification inspection conditions

4.3 Acceptance inspection conditions

4.4 Use of “statistical process control” (SPC)

5 Requirements

Bibliography