The symbol represents which of the following type of weld?

The Lap-Joint can be welded with the bevel groove, J-groove, fillet, slot, plug, spot, projection and seam SYMBOL DIMENSION APPLICATION GUIDE Fillet Weld

This video covers the step-by-step guide to creating a Plug or Slot weld in NX 12 To know more

plug weld and slot weld welding symbol on a drawing In any case, no matter the NOTE: A fillet welded slot does not conform to this definition Slot Weld Plug and Slot Welds

plug and slot weld symbol Plug, Slot, or Projection Welds Elements in This Area Remain As Shown When Tail and Arrow are Reversed Weld Symbols Shall Be Contained Within the Length of