BS 7670-2:1997

This standard BS 7670-2:1997 Steel nuts and bolts for resistance projection welding is classified in these ICS categories:

• 25.160.10 Welding processes
• 21.060.10 Bolts, screws, studs
• 21.060.20 Nuts

This British Standard specifies projection welding of weld nuts and weld bolts singly to uncoated and coated steel sheet from 0.5 mm to 5.0 mm thick. Annex A gives recommendations for appropriate welding equipment and annex B outlines typical welding conditions.

NOTE 1. It is emphasized that this type of weld is loaded in compression only. The purpose of the weld is to prevent the fastener from rotating during assembly or disassembly of a fabrication. It is not intended as a structural weld.

This standard specifies weld nuts and weld bolts, the design, dimensions and materials of which are detailed in Part 1 of this standard. Annular projections are not included. In addition to the definitive requirements specified throughout the standard, the documented items detailed in clause 5 shall be satisfied before a claim of compliance with the standard can be made and verified.