CD Weld Pin

A CD weld pin is a small pin with a capacitor discharge weldable tip, used to attach materials to steel. It is common in insulation and sheet metal fixing.

A CD weld pin joins a metal sheet or plate to a structure by drawn arc stud welding. It takes a nut, a washer or a clip of the same thread after welding. A stud welding tool with a matching chuck and ferrule sets it.

Copper plating is often used on weld pins to improve electrical contact and resist corrosion during storage. Galvanised pins have a zinc coating for general corrosion protection after welding.

Weld pins are often made in low carbon steel, which welds readily to structural steel. Copper plating and galvanising are surface finishes on that steel base.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a certificate of conformance and check the weld tip and plating on receipt. Confirm the pin dimensions and finish match the order.