CD Stud

A CD stud is a threaded fastener with a small projection that is welded to a metal surface. It provides a male thread for attaching other parts.

A CD stud is welded to a metal surface by capacitor discharge, which gives a fast joint on thin sheet. It often takes a nut or a mating part of the same thread. A flange type spreads the weld current, a straight type suits a flush surface, and a flush head sits level with the plate.

CD studs are often made in aluminium, copper or stainless steel. Aluminium is light and conducts well, copper takes plating well, and stainless steel resists corrosion.

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 with the material and thread size. On receipt, check the weld projection is sound and the thread is free from damage.