Welding Symbols and Definitions -

Basic Welding Symbols and Their Location Significance Location Significance Fillet Plug or Slot Spot or Projection Stud Seam Back or Backing

The slot weld symbol is the same that is used for plug welds The symbol will not show a diameter symbol before the size however The size of the weld will be

plug slot Slot or Plug Welding Symbol Diagram of Plug or Slot Welding Symbol indicating angle of countersink, pitch, size and depth Plug & Slot Welds

plug and slot welds Single-U butt weld 8 Single-U butt weld 9 Backing run; back or backing weld 10 Fillet weld 11 Plug weld; plug or slot weld