Plug Weld

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As for drilling for plug welds, generally 2X the thickness gives plenty of room, since you'll also be melting the tube a bit Since that would be 140 in your

The shape of the plug weld is circular 5 Slot Weld Slot Weld  Slot and Plug Symbol Slot and plug welds are made when holes are created in one material and then welded to another by filling the holes with weld metal

free slot games no downloads or registration - Slot welds use a similar technique in an elongated hole with minimum spacing between slots of 4 times the width or 2 times the length  0: 2001 states a plug weld is and a slot weld is