What symbol type should I use? Plug? Slot?

Welders use plug weld symbols to show the amount, diameter, locations and spacing of the holes to be drilled These symbols may also include details of the

PLUG OR SLOT WELD BACKING BAR SPACER BAR BACK OR BACKING WELD SPOT WELD

plug or slot weld strength for certain welds Groove weld size Root opening; depth of filling for plug and slot welds Finish symbol Contour symbol Reference line Elements in

plug slot weld symbols for fillet welds as well as for plug and slot welds Welders slot-weld symbol, but context should make the symbol's intention clear