Steel Spot And Plug Weld Nugget Size: UPDATE

I was referring to stick welding, so yes stick welders are fine for plug welding You can make your slots shorter if you can, a 4 12 grinder can't make

The short answer is the larger the plug the easier it is to weld If you are not given specifications then I would use a 1 diameter hole through the 12 sheet

plug and slot weld symbol Most common joints are made up of fillet weld or the butt weld Plug and slot welds are not generally used in structural steel work Fig

plug weld and slot weld For example, if a diameter of a hole for a plug weld is to be 6mm, the plug weld symbol will be accompanied by Ø6 on its right side, signifying