scope:

Introduction

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose. This specification provides acceptance criteria for steel nuts, studs, cages and other parts with solid projections that are resistance projection welded in automotive products that GM is responsible for establishing or approving the product design. This specification does not cover the welding of projections that are embossed into sheet metal.

Applicability. This specification applies to resistance projection welded steel nuts, studs, cages, and other parts with solid coined projections.

The criteria established in this specification become mandatory when referenced on a weld drawing. Deviation from any weld criteria provided in this specification must be identified on a weld drawing or other product engineering design document.

Remarks. Welded fasteners are considered satisfactory when they meet the expected design service loads and satisfy functional performance requirements. The evaluation criteria contained in this document has been established as a basis for the manufacturing acceptance of welded products and are the same for all welds regardless of service load. Furthermore, welds identified as discrepant often retain a percentage of their mechanical properties and may contribute to the integrity of the welded product. Application of this specification for other uses, such as post-crash weld quality assessment, may lead to erroneous results or conclusions.

Clarification. For clarification of this specification or editorial comments, email the GM Weld Council at weld.council@gm.com.